Tricyclic oxazolidinone antibiotic compounds

ABSTRACT

The present invention relates to antibacterial compounds of formula (I) wherein “----” is a bond or is absent, V is CH, CR 6  or N; R 0  is H or, if “----” is a bond, may also be alkoxy; R 1  is cyano, alkyl, or ethynyl; U is CH or N when “----” is a bond, or, if “----” is absent, U is CH 2 , NH or NH 9 ; R 2  is H, alkylcarbonyl or CH 2 —R 3 ; R 3  is H, alkyl or hydroxyalkyl; R 4  is H or, if n is not 0 and R 5  is H, may also be OH; R 5  is H, alkyl, hydroxyalkyl, aminoalkyl, alkoxyalkyl, carboxy or alkoxycarbonyl; R 6  is hydroxyalkyl, carboxy, alkoxycarbonyl or —(CH 2 ) q —NR 7 R 8 , q being 1, 2 or 3 and each of R 7  and R 8  independently being H or alkyl or R 7  and R 8  forming with the N atom bearing them a ring; R 9  is alkyl or hydroxyalkyl; A is —(CH 2 ) p —, —CH 2 CH 2 CH(OH)— or —COCH 2 CH(OH)—; G is substituted phenyl or G 1  or G 2 , wherein Q is O or S and X is CH or N; and Y 1 , Y 2  and Y 3  may each be CH or N; and n is 0 when A is —CH 2 CH 2 CH(OH)— or —COCH 2 CH(OH)—, and n is 0, 1 or 2 when A is —(CH 2 ) p —, p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3 or 4; and to salts of such compounds.

The present invention concerns tricyclic oxazolidinone antibiotic compounds, a pharmaceutical antibacterial composition containing them and the use of these compounds in the manufacture of a medicament for the treatment of infections (e.g. bacterial infections). These compounds are useful antimicrobial agents effective against a variety of human and veterinary pathogens including among others Gram-positive and Gram-negative aerobic and anaerobic bacteria and mycobacteria.

The intensive use of antibiotics has exerted a selective evolutionary pressure on microorganisms to produce genetically based resistance mechanisms. Modern medicine and socio-economic behaviour exacerbate the problem of resistance development by creating slow growth situations for pathogenic microbes, e.g. in artificial joints, and by supporting long-term host reservoirs, e.g. in immuno-compromised patients.

In hospital settings, an increasing number of strains of Staphylococcus aureus, Streptococcus pneumoniae, Enterococcus spp., and Pseudomonas aeruginosa, major sources of infections, are becoming multi-drug resistant and therefore difficult if not impossible to treat:

-   -   S. aureus is resistant to β-lactams, quinolones and now even to         vancomycin;     -   S. pneumoniae is becoming resistant to penicillin or quinolone         antibiotics and even to new macrolides;     -   Enteroccocci are quinolone and vancomycin resistant and β-lactam         antibiotics are inefficacious against these strains;     -   Enterobacteriacea are cephalosporin and quinolone resistant;

P. aeruginosa are β-lactam and quinolone resistant.

Furthermore, the incidence of multi-drug-resistant Gram-negative strains such as Enterobacteriacae and Pseudomonas aeruginosa, is steadily increasing and new emerging organisms like Acinetobacter spp. or Clostridium difficile, which have been selected during therapy with the currently used antibiotics, are becoming a real problem in hospital settings. Therefore, there is a high medical need for new antibacterial agents which overcome multidrug-resistant Gram-negative bacilli such as A. baumannii, ESBL-producing E. coli and Klebsiella species and Pseudomonas aeruginosa (Clinical Infectious Diseases (2006), 42, 657-68).

In addition, microorganisms that are causing persistent infections are increasingly being recognized as causative agents or cofactors of severe chronic diseases like peptic ulcers or heart diseases.

Azatricyclic antibiotic compounds have already been described in WO 2007/071936 and WO 2007/122258 (disclosing 3-oxo-1,2-dihydro-3H-2a,6-diaza-acenaphthyl ene-1-methyl derivatives), WO 2007/081597 (disclosing 4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-1-methyl derivatives), WO 2007/115947 (disclosing 3-oxo-5,6-dihydro-3H-pyrrolo[1,2,3-de]quinoxaline-6-methyl derivatives) and WO 2008/003690 (disclosing notably 1-(7-oxo-5,6,9a,9b-tetrahydro-4H,7H-1,6a-diaza-phenalen-5-yl)-piperidine-4-yl and 1-(5-oxo-2,3,7a,10b-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-2-yl)-piperidine-4-yl derivatives). More recently, further azatricyclic antibiotics have been described in WO 2008/120003, WO 2008/128942, WO 2008/128953, WO 2008/128962, WO 2009/000745 and WO 2009/087153 (all filed before, but published after the earliest priority date(s) of the present application).

Quinoline, naphthyridine or quinoxaline spirooxazolidinone antibiotic compounds have already been described in WO 2008/026172. More recently, other antibiotic compounds comprising an oxazolidinone motif have been disclosed in WO 2008/126024, WO 2008/126034, WO 2009/077989 and WO 2009/104159 (all filed before, but published after the earliest priority date(s) of the present application).

Moreover, azatricyclic antibiotics comprising an oxazolidinone motif have been described in WO 2009/104147 (the priority or filing dates of which are earlier than some of or all those of the present application, while the publication took place after the priority dates of the present application).

The Applicants have now found a new family of tricyclic antibiotic compounds corresponding to the formula I described hereafter.

Various embodiments of the invention are presented hereafter:

i) The invention firstly relates to compounds of formula I

wherein “-----” is a bond or is absent; R⁰ represents H or, in the case “-----” is a bond, may also represent (C₁-C₃)alkoxy (in particular methoxy); R¹ represents H, halogen (notably F, Cl or Br), cyano, (C₁-C₃)alkyl (notably methyl) or ethynyl; U represents CH or N when “-----” is a bond, or, in case “----” is absent, U represents CH₂, NH or NR⁹; V represents CH, CR⁶ or N; R² represents H, (C₁-C₃)alkylcarbonyl or a group of the formula —CH₂—R³; R³ represents H, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl; R⁴ represents H or, in the cases wherein n is not 0 and R⁵ is H, may also represent OH; R⁵ represents H, (C₁-C₃)alkyl (notably methyl), (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), (C₁-C₃)aminoalkyl (notably amino methyl), (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl), carboxy or (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl); R⁶ represents (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), carboxy, (C₁-C₃)alkoxycarbonyl or a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2 or 3 and each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ form together with the nitrogen atom bearing them a pyrrolidinyl, piperidinyl, morpholinyl or thiomorpholinyl ring; R⁹ represents (C₁-C₃)alkyl (notably methyl), 2-hydroxy-ethyl, 2-hydroxy-propyl or 3-hydroxy-propyl; A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—; G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen (notably F), whereby a (C₁-C₃)alkoxy substituent is preferably a straight chain (C₁-C₃)alkoxy and in para position, or G is a group having one of the formulae G¹ and G² below

wherein

Q is O or S and X is CH or N; and

Y¹, Y² and Y³ each represent CH, or Y¹ and Y³ each represent CH and Y² represents N, or Y¹ represents N, Y² represents CH or N and Y³ represents CH, or Y¹ and Y² each represent CH and Y³ represents N; and n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1 or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3 or 4 (i.e. when n is 0, p is not 1, when n is 1, p is not 4 and when n is 2, p is neither 3 nor 4); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I.

The following paragraphs provide definitions of the various chemical moieties for the compounds according to the invention and are intended to apply uniformly throughout the specification and claims, unless an otherwise expressly set out definition provides a broader or narrower definition:

-   -   The term “alkyl”, used alone or in combination, refers to a         straight or branched chain alkyl group containing from one to         four carbon atoms. The term “(C₁-C_(x))alkyl” (x being an         integer) refers to a straight or branched chain alkyl group         containing 1 to x carbon atoms. For example, a (C₁-C₄)alkyl         group contains from one to four carbon atoms. Representative         examples of alkyl groups include methyl, ethyl, propyl,         iso-propyl, n-butyl, iso-butyl, sec-butyl and tert-butyl.         Preferred are methyl and ethyl. Most preferred is methyl.     -   The term “alkoxy”, used alone or in combination, refers to a         straight or branched chain alkoxy group containing from one to         four carbon atoms. The term “(C_(x)-C_(y))alkoxy” (x and y each         being an integer) refers to an alkoxy group as defined before         containing x to y carbon atoms. For example, a (C₁-C₃)alkoxy         group contains from one to three carbon atoms. Representative         examples of alkoxy groups include methoxy, ethoxy, n-propoxy and         iso-propoxy. Preferred are methoxy and ethoxy.     -   The term “hydroxyalkyl” refers to a straight or branched chain         alkyl group containing from one to four carbon atoms wherein one         of the hydrogen atoms has been replaced by a hydroxy group. The         term “(C₁-C_(x))hydroxyalkyl” (x being an integer) refers to an         hydroxyalkyl group wherein the alkyl group contains 1 to x         carbon atoms. Representative examples of (C₁-C₃)hydroxyalkyl         groups include, but are not limited to, hydroxymethyl,         2-hydroxy-ethyl, 1-hydroxy-ethyl and 2-hydroxy-propyl. Preferred         (C₁-C₃)hydroxyalkyl groups are hydroxymethyl and         2-hydroxy-propyl. The most preferred (C₁-C₃)hydroxyalkyl group         is hydroxymethyl.     -   The term “aminoalkyl” refers to a straight or branched chain         alkyl group containing from one to four carbon atoms wherein one         of the hydrogen atoms has been replaced by an amino group. The         term “(C₁-C_(x))aminoalkyl” (x being an integer) refers to an         aminoalkyl group wherein the alkyl group contains 1 to x carbon         atoms. Representative examples of (C₁-C₃)aminoalkyl groups         include, but are not limited to, aminomethyl, 2-amino-ethyl,         1-amino-ethyl and 2-amino-propyl. Preferred (C₁-C₃)aminoalkyl         groups are aminomethyl and 2-amino-propyl. The most preferred         (C₁-C₃)aminoalkyl group is aminomethyl.     -   The term “alkoxyalkyl” refers to an alkoxyalkyl group wherein         the alkoxy group is a (C₁-C₄)alkoxy group and the alkyl group is         a (C₁-C₄)alkyl group. The term “(C₁-C_(x))alkoxy(C₁-C_(y))alkyl”         (x and y being each independently an integer) refers to an         alkoxyalkyl group wherein the alkoxy group contains 1 to x         carbon atoms and the alkyl group contains 1 to y carbon atoms.         Representative examples of (C₁-C₃)alkoxy(C₁-C₃)alkyl groups         include, but are not limited to, methoxymethyl and ethoxymethyl.         The most preferred (C₁-C₃)alkoxy(C₁-C₃)alkyl group is         methoxymethyl.     -   The term “alkylcarbonyl” refers to an alkylcarbonyl group         wherein the alkyl is a straight or branched chain alkyl group         containing from one to four carbon atoms. The term         “(C₁-C_(x))alkylcarbonyl” (x being an integer) refers to an         alkylcarbonyl group wherein the alkyl is a straight or branched         chain alkyl group containing 1 to x carbon atoms. Representative         examples of (C₁-C₃)alkylcarbonyl groups include acetyl,         ethylcarbonyl, 1-propyl-carbonyl and 2-propyl-carbonyl.         Preferred (C₁-C₃)alkylcarbonyl groups are acetyl and         ethylcarbonyl. The most preferred (C₁-C₃)alkylcarbonyl group is         acetyl.     -   The term “alkoxycarbonyl” refers to an alkoxycarbonyl group         wherein the alkoxy group is a straight or branched chain alkoxy         group containing from one to four carbon atoms. The term         “(C₁-C_(x))alkoxycarbonyl” (x being an integer) refers to an         alkoxycarbonyl group wherein the alkoxy is a straight or         branched chain alkoxy group containing 1 to x carbon atoms.         Representative examples of (C₁-C₃)alkoxycarbonyl groups include         methoxycarbonyl, ethoxycarbonyl, 1-propoxy-carbonyl and         2-propoxy-carbonyl. Preferred (C₁-C₃)alkylcarbonyl groups are         methoxycarbonyl and ethoxycarbonyl. The most preferred         (C₁-C₃)alkylcarbonyl group is ethoxycarbonyl.     -   The term “halogen” refers to fluorine, chlorine, bromine or         iodine, and preferably to fluorine or chlorine.     -   When in the formula

-   -   A represents the radical —CH₂CH₂CH(OH)—, this means specifically         that the CH₂ part of said radical is attached to the         neighbouring nitrogen while the CH(OH) part of said radical is         attached to the oxazolidinone ring.     -   This is applicable mutatis mutandis to all radicals that make A         radicals (e.g. to the radicals A′ mentioned in the preparation         methods). As a further example, in the substructure A, if it is         stated that A represents —COCH₂CH(OH)—, it is thereby meant that         the CO group of said radical is attached to the neighbouring         nitrogen while the CH(OH) part of said radical is attached to         the oxazolidinone ring. In other words, the left part of a         radical is always attached to the right part of the radical that         is next to the left.

In this text, a bond interrupted by a wavy line shows a point of attachment of the radical drawn to the rest of the molecule. For example, the radical drawn below

is the 3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl group.

The compounds of formula I according to this invention may contain one or more stereogenic or asymmetric centers, such as one or more asymmetric carbon atoms. The compounds of formula I may thus be present as mixtures of stereoisomers or, preferably, as pure stereoisomers. Mixtures of stereoisomers may be separated in a manner known to a person skilled in the art.

Whenever the absolute stereochemistry indication “(R)” or “(S)” is omitted in the name of a compound although there is a corresponding asymmetric carbon atom, it is meant thereby that this compound name refers to either the (R)-configured compound or the (S)-configured compound.

The relative configuration of stereoisomers having two asymmetric centers is indicated in this text by using the wording (R*,R*) to refer to either the (R,R)-configured stereomer or the (S,S)-configured stereomer and the wording (R*,S*) to refer to either the (R,S)-configured stereomer or the (S,R)-configured stereomer. Thus, for example, (1R*,2R*)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester refers to either (1R,2R)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester or (1S,2S)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester.

The present invention also includes isotopically labelled, especially ²H (deuterium) labelled compounds of formula I, which compounds are identical to the compounds of formula I except that one or more atoms have each been replaced by an atom having the same atomic number but an atomic mass different from the atomic mass usually found in nature. Isotopically labelled, especially ²H (deuterium) labelled compounds of formula I and salts thereof are within the scope of the present invention. Substitution of hydrogen with the heavier isotope ²H (deuterium) may lead to greater metabolic stability, resulting e.g. in increased in-vivo half-life or reduced dosage requirements, or may lead to reduced inhibition of cytochrome P450 enzymes, resulting e.g. in an improved safety profile. In one variant of the invention, the compounds of formula I are not isotopically labelled, or they are labelled only with one or more deuterium atoms. In a sub-variant, the compounds of formula I are not isotopically labelled at all. Isotopically labelled compounds of formula I may be prepared in analogy to the methods described hereinafter, but using the appropriate isotopic variation of suitable reagents or starting materials.

The term “pharmaceutically acceptable salts” refers to non-toxic, inorganic or organic acid and/or base addition salts. Reference can be made to “Salt selection for basic drugs”, Int. J. Pharm. (1986), 33, 201-217.

Besides, the term “room temperature” as used herein refers to a temperature of 25° C.

Unless used regarding temperatures, the term “about” placed before a numerical value “X” refers in the current application to an interval extending from X minus 10% of X to X plus 10% of X, and preferably to an interval extending from X minus 5% of X to X plus 5% of X. In the particular case of temperatures, the term “about” placed before a temperature “Y” refers in the current application to an interval extending from the temperature Y minus 10° C. to Y plus 10° C., and preferably to an interval extending from Y minus 5° C. to Y plus 5° C.

ii) The invention relates notably to compounds of formula I according to embodiment i) that are also compounds of formula I_(P3)

wherein “-----” is a bond or is absent; R⁰ represents H or, in the case “-----” is a bond, may also represent (C₁-C₃)alkoxy (in particular methoxy); R¹ represents H, halogen (notably F or Br), cyano or (C₁-C₃)alkyl (notably methyl); U represents CH or N when “-----” is a bond, or, in case “----” is absent, U represents CH₂ or NH; V represents CH, CR⁶ or N; R² represents H, (C₁-C₃)alkylcarbonyl or a group of the formula —CH₂—R³; R³ represents H, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl; R⁴ represents H or, in the cases wherein n is not 0 and R⁵ is H, may also represent OH; R⁵ represents H, (C₁-C₃)alkyl (notably methyl), (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl) or (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl); R⁶ represents (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), carboxy, (C₁-C₃)alkoxycarbonyl or a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2 or 3 and each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ form together with the nitrogen atom bearing them a pyrrolidinyl, piperidinyl, morpholinyl or thiomorpholinyl ring; A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—; G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen (notably F), whereby a (C₁-C₃)alkoxy substituent is preferably a straight chain (C₁-C₃)alkoxy and in para position, or G is a group having one of the formulae G¹ and G² below

wherein

Q is O or S and X is CH or N; and

Y¹, Y² and Y³ each represent CH, or Y¹ and Y³ each represent CH and Y² represents N, or Y¹ represents N, Y² represents CH or N and Y³ represents CH, or Y¹ and Y² each represent CH and Y³ represents N; and n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1 or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3 or 4 (i.e. when n is 0, p is not 1, when n is 1, p is not 4 and when n is 2, p is neither 3 nor 4); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I_(P3).

iii) The invention furthermore relates notably to compounds of formula I according to embodiment i) or ii) that are also compounds of formula I_(P2)

wherein “-----” is a bond or is absent; R⁰ represents H or, in the case “-----” is a bond, may also represent (C₁-C₃)alkoxy (in particular methoxy); R¹ represents H or halogen (notably F); U represents CH or N when “-----” is a bond, or, in case “----” is absent, U represents CH₂ or NH; V represents CH or N; R² represents H or a group of the formula —CH₂—R³, R³ being hydrogen, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl; A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—; G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen (notably F), whereby a (C₁-C₃)alkoxy substituent is preferably a straight chain (C₁-C₃)alkoxy and in para position, or G is a group having one of the formulae G¹ and G² below

wherein

Q is O or S and X is CH or N; and

Y¹, Y² and Y³ each represent CH, or Y¹ and Y³ each represent CH and Y² represents N, or Y¹ represents N, Y² represents CH or N and Y³ represents CH, or Y¹ and Y² each represent CH and Y³ represents N; and n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1 or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3 or 4 (i.e. when n is 0, p is not 1, when n is 1, p is not 4 and when n is 2, p is neither 3 nor 4); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I_(P2).

iv) The invention yet relates to compounds of formula I as defined in embodiment i), ii) or iii) that are also compounds of formula I_(P1)

wherein “-----” is a bond or is absent; R¹ represents H or halogen (notably F); V represents CH or N; U represents CH or N, or, in case “----” is absent, U represents CH₂ or NH; G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen (notably F), whereby a (C₁-C₃)alkoxy substituent is preferably a straight chain (C₁-C₃)alkoxy and in para position, or G is a group having one of the formulae G¹ and G² below

wherein

Q is O or S and X is CH or N; and

Y¹, Y² and Y³ each represent CH, or Y¹ and Y³ each represent CH and Y² represents N, or Y¹ represents N, Y² represents CH or N and Y³ represents CH, or Y¹ and Y² each represent CH and Y³ represents N; and n is 0, 1 or 2 and p is 1, 2 or 3, with the proviso that the sum of n and p is either 2 or 3 (i.e. when n is 0, p is 2 or 3, when n is 1, p is 1 or 2 and when n is 2, p is 1); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula Ip.

v) In particular, the invention relates to compounds of formula I as defined in embodiment i) that are also compounds of formula I_(CE)

wherein “-----” is a bond, V represents CH and U represents CH or N, or “-----” is a bond, V represents CR⁶ and U represents CH, or also “-----” is a bond, V represents N and U represents CH, or “-----” is absent, V represents CH and U represents CH₂, NH or NR⁹;

-   R⁰ represents H or, in the case “----” is a bond, may also represent     (C₁-C₃)alkoxy (in particular methoxy);     R¹ represents H, halogen (notably F, Cl or Br), cyano, (C₁-C₃)alkyl     (notably methyl) or ethynyl;     V represents CH, CR⁶ or N;     R² represents H, acetyl or a group of the formula —CH₂—R³;     R³ represents hydrogen, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl;     R⁴ represents H or, in the cases wherein n is not 0 and R⁵ is H, may     also represent OH;     R⁵ represents H, (C₁-C₃)alkyl (notably methyl), (C₁-C₃)hydroxyalkyl     (notably hydroxymethyl), (C₁-C₃)amino alkyl (notably amino methyl),     (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl), carboxy or     (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl);     R⁶ represents (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), carboxy,     (C₁-C₃)alkoxycarbonyl or a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2     or 3 (notably 1) and each of R⁷ and R⁸ independently represents H or     (C₁-C₃)alkyl or R⁷ and R⁸ form together with the nitrogen atom     bearing them a pyrrolidinyl or piperidinyl ring (notably a     pyrrolidinyl ring);     R⁹ represents (C₁-C₃)alkyl (notably methyl), 2-hydroxy-ethyl,     2-hydroxy-propyl or 3-hydroxy-propyl;     A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—;     G represents a phenyl group which is substituted once or twice in     the meta and/or para position(s) by substituents selected     independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen     (notably F), whereby a (C₁-C₃)alkoxy substituent is preferably a     straight chain (C₁-C₃)alkoxy and in para position, or G is a group     having one of the formulae G¹ and G²′ below

wherein

Q is O or S and X is CH or N; and

each of Y¹ and Y³ represents CH, or one of Y¹ and Y³ represents N and the other represents CH; and n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1 or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3 or 4 (i.e. when n is 0, p is not 1, when n is 1, p is not 4 and when n is 2, p is neither 3 nor 4); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I_(CE).

vi) Also in particular, the invention relates to compounds of formula I as defined in embodiment i), ii) or v) that are also compounds of formula I_(CEP3)

wherein “-----” is a bond, V represents CH and U represents CH or N, or “-----” is a bond, V represents CR⁶ and U represents CH, or also “-----” is a bond, V represents N and U represents CH, or “-----” is absent, V represents CH and U represents CH₂ or NH; R⁰ represents H or, in the case “-----” is a bond, may also represent (C₁-C₃)alkoxy (in particular methoxy); R¹ represents H, halogen (notably F or Br), cyano or (C₁-C₃)alkyl (notably methyl); V represents CH, CR⁶ or N; R² represents H, acetyl or a group of the formula —CH₂—R³; R³ represents hydrogen, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl; R⁴ represents H or, in the cases wherein n is not 0 and R⁵ is H, may also represent OH; R⁵ represents H, (C₁-C₃)alkyl (notably methyl), (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl) or (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl); R⁶ represents (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), carboxy, (C₁-C₃)alkoxycarbonyl or a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2 or 3 (notably 1) and each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ form together with the nitrogen atom bearing them a pyrrolidinyl or piperidinyl ring (notably a pyrrolidinyl ring); A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—; G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen (notably F), whereby a (C₁-C₃)alkoxy substituent is preferably a straight chain (C₁-C₃)alkoxy and in para position, or G is a group having one of the formulae G¹ and G²′ below

wherein

Q is O or S and X is CH or N; and

each of Y¹ and Y³ represents CH, or one of Y¹ and Y³ represents N and the other represents CH; and n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1 or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3 or 4 (i.e. when n is 0, p is not 1, when n is 1, p is not 4 and when n is 2, p is neither 3 nor 4); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I_(CE).

vii) The invention furthermore relates to compounds of formula I as defined in embodiment i), ii), iii), v) or vi) that are also compounds of formula I_(CEP2)

wherein “-----” is a bond, V represents CH and U represents CH or N or V represents N and U represents CH, or “-----” is absent, V represents CH and U represents CH₂ or NH; R⁰ represents H or, in the case “-----” is a bond, may also represent (C₁-C₃)alkoxy (in particular methoxy); R¹ represents H or halogen (notably F); R² represents H or a group of the formula —CH₂—R³, R³ being (C₁-C₃)hydroxyalkyl; A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—; G represents a phenyl group which is substituted once in a meta position and once in the para position by substituents selected independently from (C₁-C₄)alkyl and a halogen (notably F), G represents a phenyl group which is substituted in the para position by a substituent selected from (C₁-C₄)alkyl and (C₁-C₃)alkoxy, or also G is a group having one of the formulae G¹ and G²′ below

wherein X represents CH or N and Q represents O or S; each of Y¹ and Y³ represents CH, or one of Y¹ and Y³ represents N and the other represents CH; n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1 or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the provisos that when n is 0, p is 2 or 3, when n is 1, p is 1, 2 or 3 and when n is 2, p is 1; and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I_(CEP2).

viii) The invention yet relates to compounds of formula I as defined in one of embodiments i) to vii) that are also compounds of formula I_(CEP1)

wherein R¹ represents H or halogen (notably F); “-----” is a bond, V represents CH and U represents CH or N or V represents N and U represents CH, or “-----” is absent, V represents CH and U represents CH₂; G represents a phenyl group which is substituted once in a meta position and once in the para position by substituents selected independently from (C₁-C₄)alkyl and a halogen (notably F), or G is a group having one of the formulae G¹′ and G²′ below

wherein Q represents O or S; n is 0, 1 or 2 and p is 1, 2 or 3, with the proviso that the sum of n and p is either 2 or 3 (i.e. when n is 0, p is 2 or 3, when n is 1, p is 1 or 2 and when n is 2, p is 1); and to salts (in particular pharmaceutically acceptable salts) of compounds of formula I_(CEP1).

ix) According to one main variant of this invention, the compounds of formula I as defined in one of embodiments i) to viii) above will be such that R¹ represents halogen (notably F, Cl or Br, preferably F or Br and in particular F).

x) According to another main variant of this invention, the compounds of formula I as defined in one of embodiments i) to viii) above will be such that R¹ represents H.

xi) According to a further main variant of this invention, the compounds of formula I as defined in embodiment i), ii), v) or vi) above will be such that R¹ represents (C₁-C₃)alkyl (notably methyl).

xii) According to yet a further main variant of this invention, the compounds of formula I as defined in embodiment i) or v) above will be such that R¹ represents ethynyl.

xiii) One main embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xii) above wherein V represents CH (and notably to compounds of formula I as defined in embodiment iv) or viii) wherein V represents CH and R¹ represents fluorine).

xiv) Another main embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xii) above wherein V represents N (and notably to compounds of formula I as defined in embodiment iv) or viii) wherein V represents N and R¹ represents fluorine).

xv) A further main embodiment of this invention relates to the compounds of formula I as defined in embodiment i), ii), v) or vi) above wherein V represents CR⁶.

xvi) According to one sub-embodiment of embodiment xv) above, R⁶ will represent (C₁-C₃)hydroxyalkyl (notably hydroxymethyl).

xvii) According to another sub-embodiment of embodiment xv) above, R⁶ will represent carboxy.

xviii) According to yet another sub-embodiment of embodiment xv) above, R⁶ will represent (C₁-C₃)alkoxycarbonyl (notably ethoxycarbonyl).

xix) According to a further sub-embodiment of embodiment xv) above, R⁶ will represent a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2 or 3 (in particular 1) and each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ form together with the nitrogen atom bearing them a pyrrolidinyl, piperidinyl, morpholinyl or thiomorpholinyl ring, and in particular a pyrrolidinyl or piperidinyl ring (such a group —(CH₂)_(q)—NR⁷R⁸ being notably dimethylaminomethyl or pyrrolidin-1-ylmethyl).

xx) A further embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xix) above wherein “-----” is a bond; such embodiment thus notably relates to compounds of formula I as defined in embodiment iv) or viii) wherein “-----” is a bond and:

-   -   R¹ represents fluorine, or     -   R¹ represents fluorine and V represents CH, or     -   R¹ represents fluorine and V represents N.

xxi) One sub-embodiment of embodiment xx) above relates to the compounds of formula I as defined in embodiment xx) above wherein U represents CH (and notably to the compounds of formula I as defined in embodiment xiv) above wherein U represents CH and R⁰ represents H).

xxii) Another sub-embodiment of embodiment xx) above relates to the compounds of formula I as defined in embodiment xx) above wherein U represents N.

xxiii) According to one variant of sub-embodiment xxii), the compounds of formula I as defined in embodiment xxii) above will be such that R⁰ represents H (and notably such that R⁰ represents H and V represents CH).

xxiv) According to the other variant of sub-embodiment xxii), the compounds of formula I as defined in embodiment xxii) above will be such that R⁰ represents (C₁-C₃)alkoxy (and in particular methoxy); this particular variant relates notably to compounds of formula I as defined in one of embodiments i) to iii) or v) to vii) wherein R⁰ represents (C₁-C₃)alkoxy (and in particular methoxy) and:

-   -   R¹ represents halogen (and preferably F), or     -   R¹ represents H, or     -   R¹ represents halogen (and preferably F) and V represents CH, or     -   R¹ represents halogen (and preferably F) and V represents N, or     -   R¹ represents H and V represents CH, or     -   R¹ represents H and V represents N, or     -   V represents CH, or     -   V represents N.

xxv) Yet a further embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xix) above wherein “-----” is absent and U represents CH₂ or NH (notably CH₂); such embodiment thus notably to compounds of formula I as defined in embodiment iv) or viii) wherein “-----” is absent, U represents CH₂ and:

-   -   R¹ represents fluorine, or     -   R¹ represents fluorine and V represents CH, or     -   R¹ represents fluorine and V represents N, or     -   V represents CH, or     -   V represents N.

xxvi) One particular embodiment of this invention relates to the compounds of formula I as defined in embodiment i), ii), v) or vi), or as defined in embodiment i), ii), v) or vi) taken together with any of embodiments ix) to xxv), wherein R⁴ represents H.

xxvii) One sub-embodiment of embodiment xxvi) relates to compounds of formula I as defined in embodiment xxvi) wherein each of R⁴ and R⁵ represents H.

xxviii) Another particular embodiment of this invention relates to the compounds of formula I as defined in embodiment i), ii), v) or vi), or as defined in embodiment i), ii), v) or vi) taken together with any of embodiments ix) to xxv), wherein n is 1 or 2, R⁴ represents OH and R⁵ represents H.

xxix) Yet another particular embodiment of this invention relates to the compounds of formula I as defined in embodiment i) or v), or as defined in embodiment i) or v) taken together with any of embodiments ix) to xxv), wherein R⁵ represents (C₁-C₃)alkyl (notably methyl), (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), (C₁-C₃)aminoalkyl (notably aminomethyl), (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl), carboxy or (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl).

xxx) In particular, the compounds of formula I as defined in embodiment xxix) will be compounds of formula I as defined in embodiment ii) or vi), or as defined in embodiment ii) or vi) taken together with any of embodiments ix) to xxv), wherein R⁵ represents (C₁-C₃)alkyl (notably methyl), (C₁-C₃)hydroxyalkyl (notably hydroxymethyl), (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl) or (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl).

xxxi) According to one variant of embodiment xxix) or xxx), R⁵ will represent (C₁-C₃)alkyl (notably methyl).

xxxii) According to another variant of embodiment xxix) or xxx), R⁵ will represent (C₁-C₃)hydroxyalkyl (notably hydroxymethyl or 1-hydroxy-1-methyl-ethyl and in particular hydroxymethyl).

xxxiii) According to yet another variant of embodiment xxix) or xxx), R⁵ will represent (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl).

xxxiv) According to a further variant of embodiment xxix), R⁵ will represent (C₁-C₃)alkoxycarbonyl (notably methoxycarbonyl).

xxxv) According to yet a further variant of embodiment xxix), R⁵ will represent (C₁-C₃)aminoalkyl (notably aminomethyl).

xxxvi) According to yet a further variant of embodiment xxix), R⁵ will represent carboxy.

xxxvii) According to one main variant of this invention, the compounds of formula I as defined in one of embodiments i) to xxxvi) will be such that A represents —(CH₂)_(p)— (whereby in such case the compounds of formula I wherein n is 0 and p is 2 or 3, or n is 1 and p is 1, 2 or 3, or n is 2 and p is 1 will in a general manner be preferred).

xxxviii) According to one sub-embodiment of embodiment xxxvii), the compounds of formula I as defined in embodiment xxxvii) will be such that the sum of n and p is 2.

xxxix) According to one variant of embodiment xxxviii), the compounds of formula I will be such that n is 0 and p is 2.

xl) According to another variant of embodiment xxxviii), the compounds of formula I will be such that n is 1 and p is 1.

xli) According to another sub-embodiment of embodiment xxxvii), the compounds of formula I as defined in embodiment xxxvii) will be such that the sum of n and p is 3 (and notably such that the sum of n and p is 3, each of R⁰, R⁴ and R⁵ represents H and G is a group of the formula G¹ or G² as defined in embodiment i), ii) or iii)).

xlii) According to one variant of embodiment xli), the compounds of formula I will be such that n is 0 and p is 3.

xliii) The compounds of formula I as defined in embodiment xlii) will notably be such that “-----” is a bond, each of R⁰, R⁴ and R⁵ represents H, R¹ represents H or F (in particular F), V represents CH, U represents CH or N and G is a group of the formula G¹ or G² as defined in embodiment i), ii) or iii) (and in particular a group of the formula G¹ as defined in embodiment i), ii) or iii), notably such a group of the formula G¹ wherein X is CH and Q is S).

xliv) According to another variant of embodiment xli), the compounds of formula I will be such that n is 1 and p is 2.

xlv) The compounds of formula I as defined in embodiment xliv) will notably be such that “-----” is a bond, each of R⁰, R⁴ and R⁵ represents H, R¹ represents H or F (in particular F), V represents CH, U represents CH or N and G is a group of the formula G¹ or G² as defined in embodiment i), ii) or iii) (and in particular a group of the formula G¹ as defined in embodiment i), ii) or iii), notably such a group of the formula G¹ wherein X is CH and Q is S).

xlvi) According to yet another variant of embodiment xli), the compounds of formula I will be such that n is 2 and p is 1.

xlvii) The compounds of formula I as defined in embodiment xlvi) will notably be such that “-----” is a bond, each of R⁰, R⁴ and R⁵ represents H, R¹ represents H or F (in particular F), V represents CH, U represents CH or N and G is a group of the formula G¹ or G² as defined in embodiment i), ii) or iii) (and in particular a group of the formula G¹ as defined in embodiment i), ii) or iii), notably such a group of the formula G¹ wherein X is CH and Q is S).

xlviii) According to another sub-embodiment of embodiment xxxvii), the compounds of formula I as defined in embodiment xxxvii) will be such that the sum of n and p is 4.

il) According to one variant of embodiment xlviii), the compounds of formula I will be such that n is 0 and p is 4.

l) According to another variant of embodiment xlviii), the compounds of formula I will be such that n is 1 and p is 3.

li) According to yet another variant of embodiment xlviii), the compounds of formula I will be such that n is 2 and p is 2.

lii) Another main variant of this invention relates to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) wherein A represents —CH₂CH₂CH(OH)—, or to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) taken together with any of embodiments ix) to xxxvi) wherein A represents —CH₂CH₂CH(OH)—.

liii) Yet another main variant of this invention relates to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) wherein A represents —COCH₂CH(OH)—, or to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) taken together with any of embodiments vii) to xxxvi) wherein A represents —COCH₂CH(OH)—.

liv) A further embodiment of this invention relates to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) wherein R² represents H, or to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) taken together with any of embodiments ix) to liii) wherein R² represents H.

lv) Yet a further embodiment of this invention relates to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) wherein R² represents a group of the formula —CH₂—R³, R³ being hydrogen, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl, or to the compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) taken together with any of embodiments ix) to liii) wherein R² represents a group of the formula —CH₂—R³, R³ being hydrogen, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl (and in particular to the compounds of formula I as defined in embodiment iii) or vii) wherein R² represents a group of the formula —CH₂—R³, R³ being (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl, or to the compounds of formula I as defined in embodiment iii) or vii) taken together with any of embodiments ix), x), xiii), xiv), xx) to xxv) and xxxvii) to liii) wherein R² represents a group of the formula —CH₂—R³, R³ being (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl).

lvi) According to one variant of embodiment lv), the compounds of formula I as defined in embodiment lv) will be such that R² represents a group of the formula —CH₂—R³ wherein R³ is hydrogen or (C₁-C₃)alkyl.

lvii) According to another variant of embodiment lv), the compounds of formula I as defined in embodiment lv) will be such that R² represents a group of the formula —CH₂—R³ wherein R³ is (C₁-C₃)hydroxyalkyl (in particular such that R² represents a group 2-hydroxy-ethyl or 3-hydroxy-propyl).

lviii) Yet a further embodiment of this invention relates to the compounds of formula I as defined in embodiment i), ii), v) or vi) wherein R² represents (C₁-C₃)alkylcarbonyl (notably acetyl), or to the compounds of formula I as defined in embodiment i), ii), v) or vi) taken together with any of embodiments ix) to liii) wherein R² represents (C₁-C₃)alkylcarbonyl (notably acetyl).

lix) According to one particular embodiment of this invention, the compounds of formula I as defined in embodiments i) to lviii) above will be such that G represents a group of the formula G¹, or, in the embodiments referring to embodiment viii), the group G¹′.

lx) Preferably, the compounds of formula I as defined in embodiment lix) above will be such that X, if present, represents CH (that is, G represents 3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl or 3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl); a particular sub-embodiment of this embodiment will relate to compounds of formula I as defined in embodiment iv) or viii) wherein G represents 3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl or 3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl and:

-   -   R¹ represents fluorine, or     -   V represents CH, or     -   V represents N, or     -   R¹ represents fluorine and V represents CH, or     -   R¹ represents fluorine and V represents N, or     -   R¹ represents fluorine and “-----” is a bond, or     -   R¹ represents fluorine, “-----” is a bond and V represents CH,     -   R¹ represents fluorine, “-----” is a bond and V represents N,     -   “-----” is absent and U represents CH₂, or     -   R¹ represents fluorine, “-----” is absent and U represents CH₂,         or     -   R¹ represents fluorine, V represents CH, “-----” is absent and U         represents CH₂, or     -   R¹ represents fluorine, V represents N, “-----” is absent and U         represents CH₂.

lxi) According to another particular embodiment of this invention, the compounds of formula I as defined in embodiments i) to lviii) above will be such that G represents a group of the formula G², or, in the embodiments referring to embodiment v), vi), vii) or viii), the group G²′.

lxii) According to a variant of embodiment lxi), the compounds of formula I as defined in embodiment lxi) above will be such that either each of Y¹, Y² and Y³, if present, represents CH, or one of Y¹ and Y³, if present, represents N and Y² and the other of Y¹ and Y³, if present, each represent CH (that is, G represents 2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl, 2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl or 2,3-dihydro-benzo[1,4]dioxin-6-yl).

lxiii) Preferably, the compounds of formula I as defined in embodiment lxii) above will be such that each of Y¹, Y² and Y³, if present, represents CH (that is, G represents 2,3-dihydro-benzo[1,4]dioxin-6-yl).

lxiv) According to yet another particular embodiment of this invention, the compounds of formula I as defined in embodiments i) to lviii) above will be such that G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy and a halogen (notably F), whereby a (C₁-C₃)alkoxy substituent, if present, is preferably a straight chain (C₁-C₃)alkoxy and in para position, or, in the embodiments referring to embodiment vii) or viii), such that G represents a phenyl group which is substituted once in a meta position and once in the para position by substituents selected independently from (C₁-C₄)alkyl and a halogen (notably F).

lxv) Preferably, the compounds of formula I as defined in embodiment lxiv) above will be such that G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from methyl, ethyl, methoxy, ethoxy and halogen (notably F), whereby a methoxy or ethoxy substituent, if present, is in para position, or, in the embodiments referring to embodiment vii) or viii), such that G represents a phenyl group which is substituted once in a meta position and once in the para position by substituents selected independently from methyl and fluorine.

lxvi) In particular, the compounds of formula I as defined in embodiment lxiv) or lxv) above will be such that G represents 3-fluoro-4-methyl-phenyl.

lxvii) Yet a further embodiment of this invention relates to compounds of formula I as defined in embodiment i), ii), v) or vi) wherein:

-   -   “-----” is a bond, V represents CH and U represents CH or N, or         “-----” is absent and U represents NH;     -   R⁰ represents H or, in the case “-----” is a bond, may also         represent (C₁-C₃)alkoxy (in particular methoxy);     -   R¹ represents H or halogen (notably H, F or Br, and in         particular H or F);     -   R² represents H;     -   each of R⁴ and R⁵ represents H;     -   n is 0;     -   A represents —(CH₂)_(p)—, p being 3;     -   G is a group having the formula G¹ below

-   -   wherein X is CH or N and Q is O or S;         and to salts (in particular pharmaceutically acceptable salts)         of such compounds.

lxviii) According to one sub-embodiment of embodiment lxvii), the compounds of formula I as defined in embodiment lxiv) will be such that “-----” is a bond, V represents CH and U represents CH or N.

lxix) According to another sub-embodiment of embodiment lxvii), the compounds of formula I as defined in embodiment lxiv) will be such that “-----” is absent and U represents NH.

lxx) Yet a further embodiment of this invention relates to compounds of formula I as defined in embodiment i), ii), v) or vi) wherein:

-   -   “-----” is a bond, V represents CH and U represents CH or N, or         “-----” is absent and U represents NH;     -   R⁰ represents H or, in the case “-----” is a bond, may also         represent (C₁-C₃)alkoxy (in particular methoxy);     -   R¹ represents H or halogen (notably F or Br, in particular F);     -   R² represents H;     -   R⁴ represents H;     -   R⁵ represents H, (C₁-C₃)alkyl (notably methyl),         (C₁-C₃)hydroxyalkyl (notably hydroxymethyl),         (C₁-C₃)alkoxy(C₁-C₃)alkyl (notably methoxymethyl) or         (C₁-C₃)alkoxycarbonyl (notably acetyl);     -   n is 0;     -   A represents —(CH₂)_(p)—, p being 3; and     -   G is a group having the formula G²′ below

-   -   wherein each of Y¹ and Y³ represents CH, or one of Y¹ and Y³         represents N and the other represents CH (and in particular         wherein each of Y¹ and Y³ represents CH);         and to salts (in particular pharmaceutically acceptable salts)         of such compounds.

lxxi) According to one sub-embodiment of embodiment lxx), the compounds of formula I as defined in embodiment lxx) will be such that “-----” is a bond, V represents CH and U represents CH or N.

lxxii) According to another sub-embodiment of embodiment lxx), the compounds of formula I as defined in embodiment lxx) will be such that “-----” is absent and U represents NH.

lxxiii) One main embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xxvii) or xxix) to xxxvii), and in particular according to embodiment i) or v)), wherein n is 0 (and notably wherein n is 0, A represents (CH₂)_(p) and p is 2 or 3).

lxxiv) Another main embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xxvii) or xxix) to xxxvii), and in particular according to embodiment i) or v)), wherein n is 1 (and notably wherein n is 1, A represents (CH₂)_(p) and p is 1 or 2).

lxxv) Yet another main embodiment of this invention relates to the compounds of formula I as defined in one of embodiments i) to xxvii) or xxix) to xxxvii), and in particular according to embodiment i) or v)), wherein n is 2 (and notably wherein n is 2, A represents (CH₂)_(p) and p is 1 or 2).

lxxvi) Yet a further embodiment of this invention relates to the compounds of formula I as defined in embodiment i) or v) wherein:

-   -   “-----” is a bond and V represents CH and U represents CH or N         or V represents N and U represents CH;     -   R⁰ represents H;     -   R¹ represents H or fluorine (in particular fluorine);     -   R² represents H;     -   R⁴ represents H;     -   R⁵ represents H, methyl, hydroxymethyl or aminomethyl (and in         particular H);     -   n is 0 and A represents —(CH₂)_(p)— wherein p is 2, 3 or 4, or n         is 1 and A represents —(CH₂)_(p)— wherein p is 1, 2 or 3; and     -   G is a group having the formula G¹ below

-   -   wherein X is CH or N and Q is O or S;         and to salts (in particular pharmaceutically acceptable salts)         of such compounds.

lxxvii) Yet another embodiment of this invention relates to compounds of formula I as defined in embodiment i) or v) wherein:

-   -   “-----” is absent and U represents NH or NR⁹ wherein R⁹ is         methyl (and in particular NH);     -   R⁰ represents H;     -   R¹ represents H or fluorine (in particular fluorine);     -   R² represents H;     -   each of R⁴ and R⁵ represents H;     -   n is 0 and A represents —(CH₂)_(p)— wherein p is 2, 3 or 4, or n         is 1 and A represents —(CH₂)_(p)— wherein p is 1, 2 or 3; and     -   G is a group having the formula G¹ below

-   -   wherein X is CH or N and Q is O or S;         and to salts (in particular pharmaceutically acceptable salts)         of such compounds.

lxxviii) According to one particular variant of this invention, the compounds of formula I as defined in embodiments i) to lxxvii) above will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxix) According to one sub-variant of embodiment lxxviii), the compounds of formula I as defined in embodiment lxxviii) will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxx) According to the other sub-variant of embodiment lxxviii), the compounds of formula I as defined in embodiment lxxviii) will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula Ip₂, such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxxi) According to another particular variant of this invention, the compounds of formula I as defined in embodiments i) to lxxvii) above will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxxii) According to one sub-variant of embodiment lxxxi), the compounds of formula I as defined in embodiment lxxxi) will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxxiii) According to the other sub-variant of embodiment lxxxi), the compounds of formula I as defined in embodiment lxxxi) will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxxiv) According to yet another particular variant of this invention, the compounds of formula I as defined in embodiments i) to lxxvii) above will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxxv) According to yet another particular variant of this invention, the compounds of formula I as defined in embodiments i) to lxxvii) above will be such that their stereochemistry is as drawn below

or, in the particular case of compounds of formula I_(P2), such that their stereochemistry is as drawn below

or also, in the particular case of compounds of formula I_(P1), such that their stereochemistry is as drawn below

lxxxvi) Particularly preferred are the following compounds of formula I as defined in one of embodiments i) to viii):

-   9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{2-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (4R)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4R)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4R)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one;     as well as the salts (in particular the pharmaceutically acceptable     salts) thereof.

lxxxvii) A further object of this invention thus relates to the following compounds of formula I as defined in one of embodiments i) to viii):

-   (1R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo     quinolin-4-one; -   (1R)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({2-[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({2-[(S)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(S)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (4R)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4R)-3-fluoro-4-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4S)-3-fluoro-4-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4R)-3-fluoro-4-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4S)-3-fluoro-4-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4R)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4R)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (6R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (6S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (6R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (6S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (1R)-9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (4R)-3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (4S)-3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (1R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-1-({[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-1-({[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-({[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-({[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one;     as well as to the salts (in particular the pharmaceutically     acceptable salts) thereof.

lxxxviii) Further particularly preferred compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii) are the following compounds:

-   4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({[(R)-3-(4-butyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   1-({2-[3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-6-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   9-fluoro-1-{2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   9-fluoro-1-(2-{(3-hydroxy-propyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(2-{(2-hydroxy-ethyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({3-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   3-fluoro-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-[((3-hydroxy-propyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-[((2-hydroxy-ethyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-((3-hydroxy-propyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   6-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   1-{2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide; -   (R)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   6-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-2-methoxy-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-2-methoxy-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   9-fluoro-1-{3-hydroxy-3-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one;     as well as the salts (in particular the pharmaceutically acceptable     salts) thereof

lxxxix) A further object of this invention thus relates to the following compounds of formula I as defined in embodiment i), ii), iii), v), vi) or vii):

-   (R)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({[(R)-3-(4-butyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({[(R)-3-(4-butyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-1-({2-[(R)-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(S)-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(R)-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(S)-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(R)-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(S)-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(R)-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(S)-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-6-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-9-fluoro-1-{2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-9-fluoro-1-(2-{(3-hydroxy-propyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-(2-{(3-hydroxy-propyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-(2-{(2-hydroxy-ethyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-(2-{(2-hydroxy-ethyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-3-fluoro-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-[((3-hydroxy-propyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-[((3-hydroxy-propyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-[((2-hydroxy-ethyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-[((2-hydroxy-ethyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-((3-hydroxy-propyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-((3-hydroxy-propyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-6-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-1-{2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)—N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide; -   (R)—N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide; -   (S)—N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide; -   (S)—N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide; -   (R)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-6-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-2-methoxy-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-2-methoxy-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (1R)-9-fluoro-1-{(3R)-3-hydroxy-3-[(5R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{(3R)-3-hydroxy-3-[(5S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{(3S)-3-hydroxy-3-[(5R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R)-9-fluoro-1-{(3S)-3-hydroxy-3-[(5S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{(3R)-3-hydroxy-3-[(5R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{(3R)-3-hydroxy-3-[(5S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{(3S)-3-hydroxy-3-[(5R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S)-9-fluoro-1-{(3S)-3-hydroxy-3-[(5S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one;     as well as to the salts (in particular the pharmaceutically     acceptable salts) thereof.

xc) Yet further particularly preferred compounds of formula I as defined in embodiment ii) or vi) are the following compounds:

-   6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   9-bromo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; -   4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; -   (R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic     acid ethyl ester; -   (R)-7-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-1-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic     acid; -   (R)-7-dimethylaminomethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-7-pyrrolidin-1-ylmethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   9-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-(methyl-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (RS)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-{4-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (1R*,2R*)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1R*,2R*)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1R*,2R*)-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2R*)-2-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2R*)-2-methoxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2R*)-2-(1-hydroxy-1-methyl-ethyl)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   N-(9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-N-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-acetamide; -   (S)-4-hydroxy-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   9-fluoro-1-hydroxy-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one;     as well as the salts (in particular the pharmaceutically acceptable     salts) thereof.

xci) Yet a further object of this invention thus relates to the following compounds of formula I as defined in embodiment ii) or vi):

-   (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-9-bromo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-bromo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; -   (S)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; -   (R)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; -   (S)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; -   (R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic     acid ethyl ester; -   (R)-7-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic     acid; -   (R)-7-dimethylaminomethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-7-pyrrolidin-1-ylmethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-9-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-(methyl-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-(methyl-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{4-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{4-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{4-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{4-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (1R,2R)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1S,2S)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1R,2R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester;     -   (1S,2S)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic         acid methyl ester; -   (1R,2R)-2-hydroxy     methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2S)-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2R)-2-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2S)-2-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2R)-2-methoxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2S)-2-methoxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2R)-2-(1-hydroxy-1-methyl-ethyl)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2S)-2-(1-hydroxy-1-methyl-ethyl)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   N—((R)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-N-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-acetamide; -   N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-N-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-acetamide; -   (S)-4-hydroxy-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one; -   (R)-9-fluoro-1-hydroxy-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-hydroxy-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one;     as well as to the salts (in particular the pharmaceutically     acceptable salts) thereof.

xcii) Yet other particularly preferred compounds of formula I as defined in embodiment i) or v) are the following compounds:

-   1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-ethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-ethynyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2R*)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1R*,2R*)-9-fluoro-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-9-fluoro-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2R*)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid; -   9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R*,2S*)-2-aminomethyl-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-methyl-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-(3-hydroxypropyl)-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one;     as well as the salts (in particular the pharmaceutically acceptable     salts) thereof.

xciii) Yet another object of this invention thus relates to the following compounds of formula I as defined in embodiment i) or v):

-   (R)-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-ethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-ethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-ethynyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-ethynyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2R)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1S,2S)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid methyl ester; -   (1R,2R)-9-fluoro-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2S)-9-fluoro-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-9-fluoro-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-9-fluoro-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2R)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid; -   (1S,2S)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic     acid; -   (R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1R,2S)-2-aminomethyl-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (1S,2R)-2-aminomethyl-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-methyl-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-methyl-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-(3-hydroxypropyl)-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one; -   (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-(3-hydroxypropyl)-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one;     as well as to the salts (in particular the pharmaceutically     acceptable salts) thereof.

xciv) The invention further relates to the compounds of formula I as defined in embodiment i) or v) which are selected from the group consisting of the compounds listed in embodiment lxxxvi), the compounds listed in embodiment lxxxviii), the compounds listed in embodiment xc) and the compounds listed in embodiment xcii), as well as to the salts (in particular the pharmaceutically acceptable salts) of such compounds. In particular, it also relates to the groups of compounds of formula I selected from the group consisting of the compounds listed in embodiment lxxxvi), the compounds listed in embodiment lxxxviii), the compounds listed in embodiment xc) and the compounds listed in embodiment xcii), which groups of compounds furthermore correspond to one of embodiments ix) to lxxxv), as well as to the salts (in particular the pharmaceutically acceptable salts) of such compounds.

xcv) The invention moreover relates to the compounds of formula I as defined in embodiment i) or v) which are selected from the group consisting of the compounds listed in embodiment lxxxvii), the compounds listed in embodiment lxxxix), the compounds listed in embodiment xci) and the compounds listed in embodiment xciii), as well as to the salts (in particular the pharmaceutically acceptable salts) of such compounds. In particular, it also relates to the groups of compounds of formula I selected from the group consisting of the compounds listed in embodiment lxxxvii), the compounds listed in embodiment lxxxix), the compounds listed in embodiment xci) and the compounds listed in embodiment xciii), which groups of compounds furthermore correspond to one of embodiments ix) to lxxxv), as well as to the salts (in particular the pharmaceutically acceptable salts) of such compounds.

The compounds of formula I according to the invention, i.e. according to one of embodiments i) to xcv) above, are suitable for the use as chemotherapeutic active compounds in human and veterinary medicine and as substances for preserving inorganic and organic materials in particular all types of organic materials for example polymers, lubricants, paints, fibres, leather, paper and wood.

The compounds of formula I according to the invention are particularly active against bacteria and bacteria-like organisms. They are therefore particularly suitable in human and veterinary medicine for the prophylaxis and chemotherapy of local and systemic infections caused by these pathogens as well as disorders related to bacterial infections comprising pneumonia, otitis media, sinusitis, bronchitis, tonsillitis, and mastoiditis related to infection by Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, Staphylococcus aureus, Enterococcus faecalis, E. faecium, E. casseliflavus, S. epidermidis, S. haemolyticus, or Peptostreptococcus spp.; pharyngitis, rheumatic fever, and glomerulonephritis related to infection by Streptococcus pyogenes, Groups C and G streptococci, Corynebacterium diphtheriae, or Actinobacillus haemolyticum; respiratory tract infections related to infection by Mycoplasma pneumoniae, Legionella pneumophila, Streptococcus pneumoniae, Haemophilus influenzae, or Chlamydia pneumoniae; blood and tissue infections, including endocarditis and osteomyelitis, caused by S. aureus, S. haemolyticus, E. faecalis, E. faecium, E. durans, including strains resistant to known antibacterials such as, but not limited to, beta-lactams, vancomycin, aminoglycosides, quinolones, chloramphenicol, tetracyclines and macrolides; uncomplicated skin and soft tissue infections and abscesses, and puerperal fever related to infection by Staphylococcus aureus, coagulase-negative staphylococci (i.e., S. epidermidis, S. haemolyticus, etc.), Streptococcus pyogenes, Streptococcus agalactiae, Streptococcal groups C-F (minute colony streptococci), viridans streptococci, Corynebacterium minutissimum, Clostridium spp., or Bartonella henselae; uncomplicated acute urinary tract infections related to infection by Staphylococcus aureus, coagulase-negative staphylococcal species, or Enterococcus spp.; urethritis and cervicitis; sexually transmitted diseases related to infection by Chlamydia trachomatis, Haemophilus ducreyi, Treponema pallidum, Ureaplasma urealyticum, or Neiserria gonorrheae; toxin diseases related to infection by S. aureus (food poisoning and toxic shock syndrome), or Groups A, B, and C streptococci; ulcers related to infection by Helicobacter pylori; systemic febrile syndromes related to infection by Borrelia recurrentis; Lyme disease related to infection by Borrelia burgdorferi; conjunctivitis, keratitis, and dacrocystitis related to infection by Chlamydia trachomatis, Neisseria gonorrhoeae, S. aureus, S. pneumoniae, S. pyogenes, H. influenzae, or Listeria spp.; disseminated Mycobacterium avium complex (MAC) disease related to infection by Mycobacterium avium, or Mycobacterium intracellulare; infections caused by Mycobacterium tuberculosis, M. leprae, M. paratuberculosis, M. kansasii, or M. chelonei; gastroenteritis related to infection by Campylobacter jejuni; intestinal protozoa related to infection by Cryptosporidium spp.; odontogenic infection related to infection by viridans streptococci; persistent cough related to infection by Bordetella pertussis; gas gangrene related to infection by Clostridium perfringens or Bacteroides spp.; and atherosclerosis or cardiovascular disease related to infection by Helicobacter pylori or Chlamydia pneumoniae.

The compounds of formula I according to the present invention are further useful for the preparation of a medicament for the treatment of infections that are mediated by bacteria such as E. coli, Klebsiella pneumoniae and other Enterobacteriaceae, Acinetobacter spp. including Acinetobacter baumanii, Stenothrophomonas maltophilia, Neisseria meningitidis, Bacillus cereus, Bacillus anthracis, Clostridium difficile, Corynebacterium spp., Propionibacterium acnes and bacteroide spp.

The compounds of formula I according to the present invention are further useful to treat protozoal infections caused by Plasmodium malaria, Plasmodium falciparum, Toxoplasma gondii, Pneumocystis carinii, Trypanosoma brucei and Leishmania spp.

The present list of pathogens is to be interpreted merely as examples and in no way as limiting.

The compounds of formula I according to this invention, or the pharmaceutically acceptable salt thereof, may be used for the preparation of a medicament, and are suitable, for the prevention or treatment (and notably for the treatment) of a bacterial infection.

One aspect of this invention therefore relates to the use of a compound of formula I according to one of embodiments i) to xcv), or of a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for the prevention or treatment (and notably for the treatment) of a bacterial infection. Another aspect of this invention relates to a compound of formula I according to one of embodiments i) to xcv), or of a pharmaceutically acceptable salt thereof, for the prevention or treatment (and notably for the treatment) of a bacterial infection.

Accordingly, the compounds of formula I according to one of embodiments i) to xcv), or the pharmaceutically acceptable salts thereof, may be used for the preparation of a medicament, and are suitable, for the prevention or treatment (and notably for the treatment) of a bacterial infection selected from the group consisting of respiratory tract infections, otitis media, meningitis, skin and soft tissue infections (whether complicated or uncomplicated), pneumonia (including hospital acquired pneumonia), bacteremia, endocarditis, intraabdominal infections, gastrointestinal infections, Clostridium difficile infections, urinary tract infections, sexually transmitted infections, foreign body infections, osteomyelitis, lyme disease, topical infections, opthalmological infections, tuberculosis and tropical diseases (e.g. malaria), and notably for the prevention or treatment (especially for the treatment) of a bacterial infection selected from the group consisting of respiratory tract infections, otitis media, meningitis, skin and soft tissue infections (whether complicated or uncomplicated), pneumonia (including hospital acquired pneumonia) and bacteremia.

As well as in humans, bacterial infections can also be treated using compounds of formula I (or pharmaceutically acceptable salts thereof) in other species like pigs, ruminants, horses, dogs, cats and poultry.

The present invention also relates to pharmacologically acceptable salts and to compositions and formulations of compounds of formula I.

Any reference to a compound of formula I is to be understood as referring also to the salts (and especially the pharmaceutically acceptable salts) of such compounds, as appropriate and expedient.

A pharmaceutical composition according to the present invention contains at least one compound of formula I (or a pharmaceutically acceptable salt thereof) as the active agent and optionally carriers and/or diluents and/or adjuvants, and may also contain additional known antibiotics.

The compounds of formula I and their pharmaceutically acceptable salts can be used as medicaments, e.g. in the form of pharmaceutical compositions for enteral or parenteral administration.

The production of the pharmaceutical compositions can be effected in a manner which will be familiar to any person skilled in the art (see for example Remington, The Science and Practice of Pharmacy, 21st Edition (2005), Part 5, “Pharmaceutical Manufacturing” [published by Lippincott Williams & Wilkins]) by bringing the described compounds of formula I or their pharmaceutically acceptable salts, optionally in combination with other therapeutically valuable substances, into a galenical administration form together with suitable, non-toxic, inert, therapeutically compatible solid or liquid carrier materials and, if desired, usual pharmaceutical adjuvants.

Another aspect of the invention concerns a method for the prevention or the treatment (and notably for the treatment) of a bacterial infection in a patient comprising the administration to said patient of a pharmaceutically active amount of a compound of formula I according to one of embodiments i) to xcv), or a pharmaceutically acceptable salt of such a compound.

Besides, any preferences and (sub-)embodiments indicated for the compounds of formula I (whether for the compounds themselves, salts thereof, compositions containing the compounds or salts thereof, uses of the compounds or salts thereof, etc.) apply mutatis mutandis to compounds of formula I_(CE), I_(P1), I_(CEP1), I_(P2), I_(CEP2), I_(P3) or I_(CEP3).

Moreover, the compounds of formula I may also be used for cleaning purposes, e.g. to remove pathogenic microbes and bacteria from surgical instruments or to make a room or an area aseptic. For such purposes, the compounds of formula I could be contained in a solution or in a spray formulation.

The compounds of formula I can be manufactured in accordance with the present invention using the procedures described hereafter.

Preparation of Compounds of Formula I Abbreviations:

The following abbreviations are used throughout the specification and the examples:

-   Ac acetyl -   AcOH acetic acid -   AD-mix α 1,4-bis(dihydroquinine)phthalazine, K₃Fe(CN)₆, K₂CO₃ and     K₂OsO₄.2H₂O -   AD-mix β 1,4-bis(dihydroquinidine)phthalazine, K₃Fe(CN)₆, K₂CO₃ and     K₂OsO₄.2H₂O -   Alloc allyloxycarbonyl -   AIBN azobisisobutyronitrile -   aq. aqueous -   9-BBN 9-borabicyclo[3.3.1]nonane -   Boc tert-butoxycarbonyl -   Bs 4-bromobenzenesulfonyl (brosylate) -   Bu n-butyl -   Cbz benzyloxycarbonyl -   CC column chromatography over silica gel -   CDI 1,1′-carbonyldiimidazole -   DAD diode array detection -   DBU 1,8-diazabicyclo[5.4.0]undec-7-ene -   DCC N,N′-dicyclohexylcarbodiimide -   DCE 1,2-dichloroethane -   DEA diethylamine -   DCM dichloromethane -   (DHQ)₂PHAL 1,4-bis(dihydroquinine)phthalazine -   (DHQD)₂PHAL 1,4-bis(dihydroquinidine)phthalazine -   DIAD diisopropylazodicarboxylate -   DIBAH diisobutylaluminium hydride -   DIPEA N,N-diisopropylethylamine -   DMAP 4-dimethylaminopyridine -   DMF N,N-dimethylformamide -   DMSO dimethylsulfoxide -   DPEphos bis(2-diphenylphosphinophenyl)ether -   DPPA diphenyl phosphorylazide -   EA ethyl acetate -   EDC 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride -   ee enantiomeric excess -   ELSD Evaporative Light Scattering Detector -   ESI Electron Spray Ionisation -   eq. equivalent -   ether diethyl ether -   Et ethyl -   EtOH ethanol -   Fmoc 9-fluorenylmethoxycarbonyl -   HATU O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium     hexafluorophosphate -   Hept heptane -   Hex hexane -   HOBT 1-hydroxybenzotriazole hydrate -   HPLC high pressure liquid chromatography -   HV high vacuum -   KHMDS potassium hexamethyldisilazide -   LAH lithium aluminium hydride -   LC liquid chromatography -   LDA lithium diisopropylamide -   LiHMDS lithium hexamethyldisilazide -   MCPBA meta-chloroperbenzoic acid -   Me methyl -   MeCN acetonitrile -   MeOH methanol -   MS Mass Spectroscopy -   Ms methanesulfonyl (mesyl) -   n-BuLi n-butyl lithium -   NBS N-bromosuccinimide -   Nf nonafluorobutanesulfonyl -   Ns 4-nitrobenzenesulfonyl (nosylate) -   NMO N-methyl-morpholine N-oxide -   org. organic -   o-Tol ortho-tolyl -   Pd/C palladium on carbon -   Pd(OH)₂/C palladium dihydroxide on carbon -   Ph phenyl -   Pht phthaloyl -   Pyr pyridine -   quant. quantitative -   rac racemic -   rt room temperature -   sat. saturated -   TBAF tetrabutylammonium fluoride -   TBDMS tert-butyldimethylsilyl -   TBME tert-butylmethylether -   TBDPS tert-butyldiphenylsilyl -   tBu tert-butyl -   TEA triethylamine -   TEMPO 2,2,6,6-tetramethyl-1-piperidinyloxy -   Tf trifluoromethanesulfonyl (triflyl) -   TFA trifluoroacetic acid -   THF tetrahydrofuran -   TLC thin layer chromatography -   TMEDA tetramethylethylenediamine -   TMS trimethylsilyl -   t_(R) retention time -   Ts para-toluenesulfonyl

General Reaction Techniques: General Reaction Technique 1 (Alkylation of an Amine):

Ammonia or the appropriate amine derivatives is/are reacted with the appropriate derivatives having a side group L¹, L², L³ or L⁴, wherein L¹, L², L³ or L⁴ represents OMs, OTf, OTs, ONs, ONf, OBs, Cl, Br or I, in presence of an inorganic base such as K₂CO₃ or an org. base such as TEA in a solvent such as THF, DMF or DMSO between 0° C. and +80° C. Further details can be found in Comprehensive Organic Transformations. A guide to Functional Group Preparations; 2^(nd) Edition, R. C. Larock, Wiley-VC; New York, Chichester, Weinheim, Brisbane, Singapore, Toronto, (1999). Section Amines p. 779.

General Reaction Technique 2 (Reductive Amination):

A solution of amine (1 mmol) and aldehyde or ketone (1 mmol) in DCE/MeOH 1:1 (10 mL) is stirred at rt overnight possibly in presence of a dessicant such as MgSO₄ or 3 Å molecular sieves. NaBH₄ (2-5 eq.) is added and the reaction allowed to proceed for one hour. The reaction is diluted with DCM and aq. NH₄OH. The org. phase is washed with water, dried over MgSO₄ and concentrated. Alternatively, a solution of amine (1 mmol) and aldehyde or ketone (1 mmol) in DCE/MeOH 1:1 (10 mL) is treated with NaBH(OAc)₃ (2 eq.). The mixture is stirred at rt until complete conversion. The reaction is diluted with DCM and aq. NH₄OH. The org. phase is washed with water, dried over MgSO₄ and concentrated.

General Reaction Technique 3 (Activation of an Alcohol):

The alcohol is reacted with MSCl, TfCl, NfCl, NsCl, BsCl or TsCl in presence of an organic base such as TEA, DIPEA or Pyr in a dry aprotic solvent such as DCM, THF or Pyr between −10° C. and rt. Alternatively, the alcohol can also be reacted with Ms₂O or Tf₂O. The activated intermediate can be further transformed into its corresponding iodo or bromo derivative by reaction of the activated alcohol with NaI or NaBr in a solvent such as acetone.

General Reaction Technique 4 (Removal of Amino Protecting Groups):

The benzyl carbamates are deprotected by hydrogenolysis over a noble metal catalyst (e.g. Pd/C or Pd(OH)₂/C). The Boc group is removed under acidic conditions such as HCl in an organic solvent such as MeOH or dioxane, or TFA neat or diluted in a solvent such DCM. Further general methods to remove amine protecting groups have been described in T. W. Greene, P. G. M. Wuts, Protecting Groups in Organic Synthesis, 3^(rd) Ed (1999), 494-653 (Publisher: John Wiley and Sons, Inc., New York, N.Y.).

General Reaction Technique 5 (Ester, Ketone or Aldehyde Reduction):

The ester is reduced with a boron or aluminium hydride reducing agent such as LiBH₄ or LAH in a solvent such as THF between −20° C. and 40° C. Alternatively, the ester function is hydrolyzed into its corresponding acid using an alkali hydroxide such as NaOH, KOH or LiOH in water or in a mixture of water with polar protic or aprotic organic solvent such as THF or MeOH between −10° C. and 50° C. The resulting carboxylic acid is further reduced into the corresponding alcohol using a borane derivative such as a BH₃.THF complex in a solvent such as THF between −10° C. and 40° C.

The aldehyde and the ketone are reduced with a boron or aluminium hydride reducing agent such as NaBH₄, LiBH₄ or LAH in a solvent such as THF between −20° C. and 40° C. Further details can be found in Comprehensive Organic Transformations. A guide to Functional Group Preparations; 2nd Edition, R. C. Larock, Wiley-VC; New York, Chichester, Weinheim, Brisbane, Singapore, Toronto, (1999). Section Alcohols and phenols, p. 1057-1087.

General Reaction Technique 6 (Cis-Dihydroxylation):

The diol is obtained by dihydroxylation of the corresponding ethylenic derivative using a catalytic amount of potassium osmate in the presence a co-oxidant such as NMO in an aq. solvent such as an acetone-water or DCM-water mixture (see Cha, J. K., Chem. Rev. (1995), 95, 1761-1795). The chiral cis-diols are obtained by using AD-mix α or AD-mix β in presence of methanesulfonamide in a water/2-methyl-2 propanol mixture as described in Chem. Rev. (1994), 94, 2483. The sense of induction relies on the chiral ligand contained in the AD mixture, either a dihydroquinine-based ligand in AD-mix α or a dihydroquinidine-based ligand in AD-mix β.

General Reaction Technique 7 (Protection of Alcohols):

The alcohols are protected as silyl ethers (usually TBDMS or TBDPS ethers). The alcohol is reacted with the required silyl chloride reagent (TBDMSCl or TBDPSCl) in presence of a base such as imidazole or TEA in a solvent such as DCM or DMF between +10° C. and +40° C. Further strategies to introduce other alcohol protecting groups have been described in T. W. Greene, P. G. M. Wuts, Protecting Groups in Organic Synthesis, 3rd Ed (1999), 23-147 (Publisher: John Wiley and Sons, Inc., New York, N.Y.).

General Reaction Technique 8 (Removal of Hydroxy Protecting Groups):

The silyl ether groups are removed either using fluoride anion sources such as TBAF in THF between 0° C. and +40° C. or HF in MeCN between 0° C. and +40° C. or using acidic conditions such as AcOH in THF/MeOH or HCl in MeOH. Further methods to remove the TBDMS and TBDPS groups are given in T. W. Greene, P. G. M. Wuts, Protecting Groups in Organic Synthesis, 3^(rd) Ed (1999), 133-139 and 142-143 respectively (Publisher: John Wiley and Sons, Inc., New York, N.Y.). Further general methods to remove alcohol protecting groups are described in T. W. Greene, P. G. M. Wuts, Protecting Groups in Organic Synthesis, 3^(rd) Ed (1999), 23-147 (Publisher: John Wiley and Sons, Inc., New York, N.Y.). In the particular case of alkylcarboxy protecting group, the free alcohol can be obtained by the action of an inorganic base such as K₂CO₃ in a solvent such as MeOH.

General Reaction Technique 9 (Formation of Aldehydes):

The alcohols can be transformed into their corresponding aldehydes through oxidation under Swern (see D. Swern et al., J. Org. Chem. (1978), 43, 2480-2482) or Dess Martin (see D. B. Dess and J. C. Martin, J. Org. Chem. (1983), 48, 4155) conditions respectively. Alternatively, the esters can be transformed into their corresponding aldehydes by controlled reduction with a bulky hydride reagent such as DIBAH.

General Reaction Technique 10 (Amine Protection):

Amines are usually protected as carbamates such as Alloc, Cbz, Boc or Fmoc. They are obtained by reacting the amine with allyl or benzyl chloroformate, di tert-butyl dicarbonate or FmocCl in presence of a base such as NaOH, TEA, DMAP or imidazole. They can also be protected as N-benzyl derivatives by reaction with benzyl bromide or chloride in presence of a base such as Na₂CO₃ or TEA. Alternatively, N-benzyl derivatives can be obtained through reductive amination in presence of benzaldehyde and a borohydride reagent such as NaBH₄, NaBH₃CN or NaBH(OAc)₃ in a solvent such as MeOH, DCE or THF. Further strategies to introduce other amine protecting groups have been described in T. W. Greene, P. G. M. Wuts, Protecting Groups in Organic Synthesis, 3rd Ed (1999), 494-653 (Publisher: John Wiley and Sons, Inc., New York, N.Y.).

General Reaction Technique 11 (Hydrogenation of a Double Bond):

The unsaturated derivatives dissolved in a solvent such as MeOH, EA or THF are hydrogenated over a noble metal catalyst such as Pd/C or PtO₂, or over Raney Ni. At the end of the reaction the catalyst is filtered off and the filtrate is evaporated under reduced pressure. Alternatively the reduction can be performed by catalytic transfer hydrogenation using Pd/C and ammonium formate as hydrogen source.

General Reaction Technique 12 (Reduction of Azides into Amines):

The azides are hydrogenated over a noble metal catalyst such as Pd/C in solvent such as MeOH or EA. In case the molecule is containing an unsaturated double or triple bond, the reduction can be performed using PPh₃ in presence of water as described in J. Med. Chem. (1993), 36, 2558-68.

General Reaction Technique 13 (Amide Formation):

The carboxylic acid is reacted with the amine in presence of an activating agent such as DCC, EDC, HOBT, n-propylphosphonic cyclic anhydride, HATU or di-(N-succinimidyl)-carbonate, in a dry aprotic solvent such as DCM, MeCN or DMF between −20° C. and +60° C. (see G. Benz in Comprehensive Organic Synthesis, B. M. Trost, I. Fleming, Eds; Pergamon Press: New York (1991), vol. 6, p. 381). Alternatively, the carboxylic acid can be activated by conversion into its corresponding acid chloride by reaction with oxalyl chloride or thionyl chloride neat or in a solvent like DCM between 20° and +60° C. Further activating agents can be found in Comprehensive Organic Transformations. A guide to Functional Group Preparations; 2nd Edition, R. C. Larock, Wiley-VC; New York, Chichester, Weinheim, Brisbane, Singapore, Toronto, 1999. Section nitriles, carboxylic acids and derivatives p. 1941-1949.

General Reaction Technique 14 (Oxidation of Alcohols/Aldehydes into Acids):

Aldehydes can be oxidized into their corresponding acids by a variety of methods as described in Comprehensive Organic Transformations. A guide to Functional Group Preparations; 2nd Edition, R. C. Larock, Wiley-VC; New York, Chichester, Weinheim, Brisbane, Singapore, Toronto, 1999. Section nitriles, carboxylic acids and derivatives, p. 1653-1655. Among them, potassium permanganate in an acetone-water mixture (see Synthesis 1987, 85) or sodium chlorite in 2-methyl-2-propanol in presence of 2-methyl-2-butene (see Tetrahedron 1981, 37, 2091-2096) are frequently used.

Alcohols can be directly oxydized into their corresponding acids by a variety of methods as described in Comprehensive Organic Transformations. A guide to Functional Group Preparations; 2nd Edition, R. C. Larock, Wiley-VC; New York, Chichester, Weinheim, Brisbane, Singapore, Toronto, 1999. Section nitriles, carboxylic acids and derivatives p. 1646-1648. Among them, [bis(acetoxy)iodo]benzene in presence of TEMPO, the Jones reagents (CrO₃/H₂SO₄), NaIO₄ in presence of RuCl₃, KMnO₄ or pyridine H₂Cr₂O₇ are frequently used.

General Preparation Methods: Preparation of the Compounds of Formula I:

The compounds of formula I can be manufactured by the methods given below, by the methods given in the examples or by analogous methods. Optimum reaction conditions may vary with the particular reactants or solvents used, but such conditions can be determined by a person skilled in the art by routine optimisation procedures.

Sections a) to r) hereafter describe general methods for preparing compounds of formula I. If not indicated otherwise, the generic groups or integers n, p, R⁰, R¹, U, V, R⁴, R⁵, R², A and G are as defined for formula I. General synthetic methods used repeatedly throughout the text below are referenced to and described in the above section entitled “General synthetic methods”. Other abbreviations used are defined in the experimental section. In some instances the generic groups R⁰, R¹, R², R⁴, R⁵, U, A and G might be incompatible with the assembly illustrated in the procedures and schemes below and so will require the use of protecting groups. The use of protecting groups is well known in the art (see for example “Protective Groups in Organic Synthesis”, T. W. Greene, P. G. M. Wuts, Wiley-Interscience, 1999).

-   a) The compounds of formula I wherein R² represents H and A     represents —(CH₂)_(p)— can be manufactured in accordance with the     present invention by reacting the compounds of formula II

-    with the compounds of formula III

-    wherein L¹ is a halogen such as bromine or iodine, or a group     OSO₂R^(a) wherein R^(a) is alkyl, CF₃ or tolyl, following general     reaction technique 1. -   b) The compounds of formula I wherein R² represents H and A     represents —CH₂CH₂CH(OH)— or —(CH₂)_(p)—, p being 3 or 4, can be     manufactured in accordance with the present invention by reacting     the compounds of formula II as defined in section a) with the     aldehydes of formula IV

-    wherein A′ represents —(CH₂)_(p-1)— or —CH₂CH(OPG)-, PG being a     silyl protecting group such as TBDMS or TBDPS, following general     reaction technique 2, the compounds thus obtained being if necessary     deprotected using general reaction technique 8. -   c) The compounds of formula I wherein R² represents H, n represents     1 or 2 and A represents —(CH₂)_(p)—, p being 1, 2 or 3, can further     be manufactured in accordance with the present invention by reacting     the compounds of formula V

-    wherein L² is a halogen such as bromine or iodine, or a group     OSO₂R^(a) wherein R^(a) is alkyl, CF₃ or tolyl, with the amines of     formula VI

-    following general reaction technique 1. -   d) The compounds of formula I wherein R² represents H, A represents     —(CH₂)_(p)— and n is 1 or 2 can be manufactured in accordance with     the present invention by reacting the compounds of formula VII

-    with the previously mentioned amines of formula VI following     general reaction technique 2. -   e) The compounds of formula I wherein “-----” is absent, R⁰     represents H and U is CH₂ or NH can be obtained by hydrogenation of     a compound of formula I wherein “-----” is a bond and U is CH or N     over a noble metal catalyst such as Pd/C, following general reaction     technique 11. In the case wherein U is N the transformation can also     be performed by reduction with a hydride reagent such as NaBH₄. -   f) The compounds of formula I wherein each of R⁴ and R⁵ represents H     and A represents —(CH₂)_(p)— can moreover be obtained by reacting     the compounds of formula VIII

-    wherein R²⁰ represents H, CH₂R³′ or an amino protecting group such     as Cbz, Boc or Fmoc and R³′ represents hydrogen or (C₁-C₃)alkyl or     also R³′ represents a (C₁-C₃)hydroxyalkyl group the hydroxy of which     is protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS     ether), with the compounds of formula IX

G-L³  IX

-    wherein L³ represents halogen. In the case of compounds of formula     IX wherein G is a group G¹ and X is N or G is a group G² and Y¹     and/or Y³ is/are N, the reaction can be performed in the presence of     NaH. This reaction can also be performed under conditions described     for the metal catalyzed N-arylation of 2-oxazolidinones or amides.     In particular by using CuI and 1,1,1-tris(hydroxymethyl)ethane in     presence of Cs₂CO₃ (Org. Lett. (2006), 8, 5609-5612), or Pd(OAc)₂     and DPEphos in presence of K₃PO₄. The compounds thus obtained are if     necessary deprotected using general reaction technique 8. -   g) The compounds of formula I wherein R² does not represent H can     furthermore be obtained by reacting the compounds of formula X

-    wherein A′ represents —(CH₂)_(p)— or —CH₂CH₂CH(OPG)-, PG being a     silyl protecting group such as TBDMS or TBDPS, with the compounds of     formula XI

R³′—CH₂-L⁴  XI

-    wherein L⁴ represents halogen or the group OSO₂R^(a) wherein R^(a)     is alkyl, CF₃ or tolyl and R³′ represents hydrogen or (C₁-C₃)alkyl     or also R³′ represents a (C₁-C₃)hydroxyalkyl group, the hydroxy of     which is protected in the form of a silyl ether (e.g. as a TBDMS or     TBDPS ether), following general reaction technique 1, the compounds     thus obtained being if necessary deprotected using general reaction     technique 8. In the particular case wherein R³′ is H, the reaction     can also be performed by reaction of the compounds of formula X as     defined above with dimethylsulfate. -   h) The compounds of formula I wherein R² does not represent H can     also be obtained by reacting the compounds of formula X as defined     above with the compounds of formula XII

R³′-CHO  XII

-    wherein R³′ represents hydrogen or (C₁-C₃)alkyl or also R³′     represents a (C₁-C₃)hydroxyalkyl group, the hydroxy of which is     protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS     ether), following general reaction technique 2, the compounds thus     obtained being if necessary deprotected using general reaction     technique 8. -   i) The compounds of formula I wherein R² does not represent H can     also be obtained by reacting the compounds of formula X as defined     above with the compounds of formula XIla

R³′—CO-L⁵  XIIa

-    wherein R³′ represents (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl group,     the hydroxy of which is protected in the form of a silyl ether (e.g.     as a TBDMS or TBDPS ether) and L⁵ represents halogen or OH,     following general reaction technique 13; the compounds thus obtained     being if necessary deprotected using general reaction technique 8.     In the particular case wherein R³′ is methyl, the reaction can also     be performed by reacting the compounds of formula X as defined above     with acetic acid anhydride. -   j) The compounds of formula I wherein R² does not represent H can     furthermore be obtained by reacting the compounds of formula XIII

-    wherein R³′ represents hydrogen or (C₁-C₃)alkyl or also R³′     represents a (C₁-C₃)hydroxyalkyl group, the hydroxy of which is     protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS     ether), with the compounds of formula XIV

-    wherein A′ represents —(CH₂)_(p-1)— or —CH₂CH(OPG)-, PG being a     silyl protecting group such as TBDMS or TBDPS, following general     reaction technique 13, the compounds thus obtained being if     necessary deprotected using general reaction technique 8. -   k) The compounds of formula I wherein R² does not represent H can be     obtained by reacting the compounds of formula XIII as defined above     with the compounds of formula III as defined above following general     reaction technique 1. The compounds thus obtained being if necessary     deprotected using general reaction technique 8. -   l) The compounds of formula I wherein R² does not represent H can     furthermore be obtained by reacting the compounds of formula V with     the compounds of formula XV

-    wherein R³′ represents hydrogen or (C₁-C₃)alkyl or also R³′     represents a (C₁-C₃)hydroxyalkyl group, the hydroxy of which is     protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS     ether), following general reaction technique 1, the compounds thus     obtained being if necessary deprotected using general reaction     technique 8. -   m) The compounds of formula I wherein R² does not represent H can be     obtained by reacting the compounds of formula VII as defined above     with the compounds of formula XV as defined above following general     reaction technique 2, the compounds thus obtained being if necessary     deprotected using general reaction technique 8. -   n) The compounds of formula I wherein V is CR⁶ and R⁶ represents     carboxy can be obtained by hydrolysis of the derivatives of formula     I wherein R⁶ represents either alkoxycarbonyl (under acidic or basic     conditions) or benzyloxycarbonyl (under hydrogenolysis conditions). -   o) The compounds of formula I wherein V is CR⁶ and R⁶ represents     —CH₂OH can be obtained by reduction of the derivatives of formula I     wherein R⁶ represents either alkoxycarbonyl or benzyloxycarbonyl     using general reaction technique 5. -   p) The compounds of formula I wherein R⁵ represents carboxy can be     obtained from the corresponding compounds of formula I wherein R⁵     represents (C₁-C₃)alkoxycarbonyl by treatment with an aq. HCl     solution. -   q) The compounds of formula I wherein R⁵ represents     (C₁-C₃)aminoalkyl can be obtained by reacting the compounds of     formula XVI

-    wherein z represents an integer from 1 to 3 and L⁶ represents     halogen or the group OSO₂R^(a) wherein R^(a) is alkyl, CF₃ or tolyl,     with sodium azide followed by transforming the intermediate azides     into the corresponding amines of formula I using general reaction     technique 12. -   r) The compounds of formula I wherein “----” is absent, U represents     NR⁹, R⁹ represents (C₁-C₃)alkyl, 2-hydroxy-ethyl, 2-hydroxy-propyl     or 3-hydroxy-propyl, R⁰ represents H, R² represents H and A     represents —(CH₂)_(p)— or —CH₂CH₂CH(OH)— can be obtained by removal     of the amino protecting group PG⁰ from the compounds of formula XVII

-    wherein PG⁰ represents an amino protecting group such as Ac, Boc,     Cbz or Fmoc and R⁹′ represents (C₁-C₃)alkyl or also R⁹′ represents a     2-hydroxy-ethyl, 2-hydroxy-propyl or 3-hydroxy-propyl group, the     hydroxy of which group has been protected in the form of a silyl     ether (e.g. as a TBDMS or TBDPS ether), using general reaction     technique 4, this reaction being followed, in the case wherein R⁹′     is a (C₂-C₃)hydroxyalkyl group, the hydroxy group of which has been     protected in the form of a silyl ether, by removal of the silyl     protecting group using general reaction technique 8.

With reference to the reactions mentioned at preceding sections a) to r), in addition to the cases already indicated, the use of hydroxy or amino protecting groups (see general reaction techniques 7 and 8 for hydroxy protecting groups and general reaction techniques 10 and 4 for amino protecting groups) is likely to be required in the following cases:

-   -   when R⁵ represents (C₁-C₃)hydroxyalkyl or (C₁-C₃)aminoalkyl;     -   when R⁶ represents (C₁-C₃)hydroxyalkyl or a group         —(CH₂)_(q)—NR⁷R⁸ wherein at least one of R⁷ and R⁸ represents H;     -   when “----” is absent and U represents NR⁹ wherein R⁹ represents         2-hydroxy-ethyl, 2-hydroxy-propyl or 3-hydroxy-propyl.

The compounds of formula I thus obtained may, if desired, be converted into their salts, and notably into their pharmaceutically acceptable salts.

Besides, whenever the compounds of formula I are obtained in the form of mixtures of enantiomers, the enantiomers can be separated using methods known to one skilled in the art, e.g. by formation and separation of diastereomeric salts or by HPLC over a chiral stationary phase such as a Regis Whelk-O1(R,R) (10 μm) column, a Daicel ChiralCel OD-H (5-10 μm) column, or a Daicel ChiralPak IA (10 μm) or AD-H (5 μm) column. Typical conditions of chiral HPLC are an isocratic mixture of eluent A (EtOH, in presence or absence of an amine such as triethylamine, diethylamine) and eluent B (hexane), at a flow rate of 0.8 to 150 mL/min. Whenever the compounds of formula I are obtained in the form of mixtures of diasteromers they may be separated by an appropriate combination of silica gel chromatography, HPLC and crystallization techniques.

Preparation of the Compounds of Formulae II to XV

The compounds of formula II can be prepared either by reaction of the compounds of formula V with sodium azide followed by transformation into the corresponding amines of formula II using general reaction technique 12 or as described in Schemes 1, 1a, 1b, 1c, 1d and 1e hereafter.

The compounds of formula II wherein each of R⁴ and R⁵ represents H can be prepared as described in Scheme 1 hereafter.

In Scheme 1, PG¹ represents an amino protecting group such as Boc or Fmoc and R^(a) represents alkyl, CF₃ or tolyl.

The protected amino alcohol derivatives of formula I-1 can be transformed into the corresponding mesylates, triflates or tosylates using general reaction technique 3. The resulting sulfonates of formula I-2 can be ring closed between rt and 110° C. affording the tricyclic derivatives of formula I-3. Then the amino protecting group can be removed using general reaction technique 4 to give the compounds of formula II wherein “-----” is a bond.

The compounds of formula II wherein “-----” is absent and U represents CH₂ or NH can be prepared by using derivatives identical to the compounds of formula I-1 except that U represents CH or N and PG¹ represents Cbz. The same synthetic sequence can be used, except that, during the last step, the hydrogenation reaction reduces both the CH═CH or CH═N double bond and removes the Cbz protecting group. In the case of compounds of formula II wherein “-----” is absent and U represents NH, the reduction of the CH═N double bond can also be carried out using a hydride reagent such as NaBH₄.

The compounds of formula II wherein R⁴ represents H and R⁵ represents (C₁-C₃)alkyl, (C₁-C₃)hydroxyalkyl, (C₁-C₃)alkoxy(C₁-C₃)alkyl or (C₁-C₃)alkoxycarbonyl can be prepared as described in Scheme 1a hereafter.

In Scheme 1a, PG² represents an amino protecting group such as Boc or Fmoc, R^(b) represents alkyl or benzyl, R^(c) represents hydrogen or alkyl and each of R^(d) and R^(e) represents alkyl.

The compounds of formula II wherein R⁴ represents H and R⁵ is (C₁-C₃)alkoxycarbonyl can be obtained by oxyamination of the acrylate derivatives of formula Ia-1 (K₂OsO₄, BocNClNa and either (DHQD)₂PHAL or (DQD)₂PHAL as described in J. Org. Chem. (2005), 70, 2847-2850). The intermediates of formula Ia-2 can be cyclised into the derivatives of formula Ia-3 using general reaction technique 3 (including heating at 50-70° C.). The corresponding compounds of formula II can then be obtained by removal of the protecting group using general reaction technique 4.

The compounds of formula II wherein R⁵ is hydroxymethyl can be obtained by reduction of the ester function of the intermediates of formula Ia-3 using general reaction technique 5. The corresponding compounds of formula II can then be obtained by removal of the protecting group in the compounds of formula Ia-4 using general reaction technique 4.

The compounds of formula II wherein R⁵ is methyl can be obtained by activation of the alcohol function of intermediates Ia-4 using general reaction technique 3 followed by reaction with a hydride reagent such as LAH or Bu₃SnH. More generally, the compounds of formula II wherein R⁵ is (C₁-C₃)alkyl can be obtained by oxidation of the intermediates of formula Ia-4 into the corresponding aldehydes following general reaction technique 9 followed by sequential Wittig reaction with alkylidene triphenylphosphorane and catalytic hydrogenation following general reaction technique 11. The protecting group of the intermediates of formula Ia-5 thus obtained can then be removed using general reaction technique 4, providing the corresponding compounds of formula II.

The compounds of formula II wherein R⁵ is alkoxymethyl can be obtained by reacting the anions of the compounds of formula Ia-4 (generated by reaction with NaH) with the corresponding halogenides of formula R^(d)—X (R^(d) being alkyl and X being halogen). The protecting group of the intermediates of formula Ia-6 thus obtained can then be removed using general reaction technique 4, providing the corresponding compounds of formula II.

The compounds of formula II wherein R⁵ is dialkylhydroxymethyl can be obtained reacting the esters of formula Ia-3 with a Grignard reagent of formula R^(e)—MgX wherein R^(e) is alkyl and X represents halogen. The protecting group of the intermediates of formula Ia-7 thus obtained can then be removed using general reaction technique 4, providing the corresponding compounds of formula II.

The compounds of formulae II and V wherein R⁴ represents OH can be prepared as described in Scheme 1b hereafter.

Accordingly, the compounds of formula V wherein R⁴ represents OH and n is 1 or 2 can be obtained by activation of the primary alcohols of formula Ib-1 or Ib-2 using general reaction technique 3 followed by reaction with NaN₃. The compounds of formula V can then be transformed into the amines of formula II using general reaction technique 12.

Besides, the compounds of formula II wherein each of R⁴ and R⁵ represents H and V represents CR⁶, R⁶ representing hydroxymethyl or a group —CH₂—NR⁷R⁸, can be prepared as described in Scheme 1c hereafter.

In Scheme 1c, PG¹ represents an amino protecting group such as Boc or Fmoc, R^(f) represents alkyl, each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ together with the nitrogen atom bearing them form a pyrrolidinyl, piperidinyl, morpholinyl or thiomorpholinyl ring.

The compounds of formula II wherein each of R⁴ and R⁵ represents H, V is CR⁶ and R⁶ represents a group —CH₂—NR⁷R⁸ can be obtained (Scheme 1c) by reducing the compounds of formula I-3 wherein V is CR⁶ and R⁶ represents (C₁-C₃)alkoxycarbonyl using general reaction technique 5, followed by either sequential activation of the alcohol group of the intermediates of formula Ic-1 using general reaction technique 3 and reaction with the amines of formula NHR⁷R⁸ using general reaction technique 1, or, depending on the nature of R⁷ and R⁸, by oxidation of the intermediates of formula Ic-1 using general reaction technique 9 followed by reductive amination using general reaction technique 2. The corresponding compounds of formula II can then be obtained by removal of the protecting group using general reaction technique 4.

The derivatives of formula II wherein each of R⁴ and R⁵ represents H, V is CR⁶ and R⁶ represents either —(CH₂)_(q)—NR⁷R⁸ or —(CH₂)_(q)—OH wherein q is 2 or 3 can be obtained by similar methods wherein the compounds of formula Ic-1 are oxidized into their corresponding aldehydes and further transformed into their homologous aldehydes by reaction with Ph₃P═CH—OMe or Ph₃P═CH—CHO followed by hydrolysis or hydrogenolysis respectively. These homologous aldehydes can be further processed affording the desired compounds of formula II wherein q is 2 or 3.

The compounds of formula II wherein n is 0 and each of R⁴ and R⁵ represents H can be prepared as described in Scheme 1d hereafter.

In Scheme 1d, PG³ represents an alcohol protecting group such as TBDMS or TBDPS and R^(a) represents alkyl, CF₃ or tolyl.

The vinylic derivatives of formula Id-1 can be transformed (Scheme 1d) into the corresponding diol derivatives of formula Id-2 using general reaction technique 6. The resulting diols can selectively be transformed into the corresponding monomesylates or monotosylates using general reaction technique 3 and the secondary alcohol function can then be protected using general reaction technique 7, affording the protected derivatives of formula Id-3 which can be cyclised under thermal conditions. The alcohol protecting group in the compounds of formula Id-4 can be removed using general reaction technique 8, affording the free alcohols of formula Id-5. The corresponding compounds of formula II can be obtained after formation of the corresponding azide derivatives (by reaction with DPPA under Mitsunobu conditions; see Synthesis (1981), 1) followed by formation of the corresponding amines using general reaction technique 12. The compounds of formula Id-5 wherein R⁰ is H can also be obtained by dihydroxylation of the vinyl derivatives of formula Id-6 using general reaction technique 6 followed by formation the corresponding carbonate derivatives of formula Id-8 after reaction with CDI or triphosgene and final treatment with a base such as Cs₂CO₃. The compounds of formulae Id-4, Id-5 and II wherein “-----” is absent and U represents CH₂ or NH can be obtained by hydrogenation of the corresponding compounds of formulae Id-4, Id-5 and II wherein “-----” is a bond and U represents CH or N.

The compounds of formula II wherein R¹ represents ethynyl can be prepared as shown in Scheme 1e hereafter.

In Scheme 1e, Hal represents a halogen atom such as bromine and PG⁴ represents an amino protecting group such as Boc or Fmoc.

The compounds of formula Ie-1 can be treated between +50° C. and +110° C. with ethynyl-trimethylsilane in the presence of PdCl₂(PPh₃)₂, CuI and a base like TEA in a solvent like dioxane, affording the compounds of formula Ie-2. The compounds of formula II wherein R¹ represents ethynyl can then be obtained from the compounds of formula Ie-2 after removal of the TMS group using TBAF in a solvent like THF and removal of the amino protecting group using general reaction technique 4.

The compounds of formula III wherein p is 1, 2, 3 or 4, the compounds of formula IV wherein A′ represents —(CH₂)_(p-1)— and p is 3 or 4, the compounds of formula VI wherein p is 1, 2, 3 or 4 and the compounds of formula XV wherein p is 1, 2, 3 or 4 can be obtained as described in Scheme 2 hereafter.

In Scheme 2, PG⁴ represents —C(O)R^(g), wherein R^(g) represents alkyl, or PG⁴ represents a silyl protecting group such as TBDMS or TBDPS.

The alcohols of formula II-2 can be obtained by reaction of the epoxides of formula II-1 with the anions of the carbamates of formula G-NH—COOR wherein R represents alkyl or benzyl in presence of a base such as KHDMS or lithium tert-butylate, followed by alcohol deprotection as described in general reaction technique 8. The compounds of formula III can then be obtained from the alcohols of formula II-2 using general reaction technique 3. The compounds of formula IV wherein A′ represents —(CH₂)_(p-1)— and p is 3 or 4 can be obtained by oxidation of the corresponding alcohol derivatives of formula II-2 using general reaction technique 9. The compounds of formula VI can be obtained by reaction of the compounds of formula III with sodium azide and subsequent transformation into the corresponding amine following general reaction technique 12. Finally, the compounds of formula XV are obtained by reaction of intermediates of formula VI with an aldehyde of formula R³′CHO following general reaction technique 2 or with a derivative of formula R³′CH₂L⁴ wherein R³′ represents a silylether protected form of the group R³ and L⁴ represents a halogen such as iodine, bromine or chlorine or a group of the formula OSO₂R^(a) wherein R^(a) is alkyl, CF₃ or tolyl following general reaction technique 1.

The compounds of formula IV wherein A′ is —CH₂CH(OPG)-, PG being a silyl protecting group such as TBDMS or TBDPS, are prepared as described in Scheme 3 hereafter.

In Scheme 3, R^(h) represents alkyl (notably tBu) and PG represents an alcohol protecting group such as TBDMS or TBDPS.

The compounds of formula III-1 can be reacted (Scheme 3) with the amines of formula G-NH₂ followed by reaction with CDI, affording the oxazolidinones of formula III-2. The corresponding alcohol derivatives of formula III-3 can be obtained after reduction of the ester of formula III-2 using general reaction technique 5. The corresponding aldehydes of formula IV can then be obtained by oxidation of the alcohol derivatives of formula III-3 using general reaction technique 9.

The compounds of formula V wherein each of R⁴ and R⁵ represents H and n is 1 or 2 can be prepared as described in Scheme 4 hereafter.

In Scheme 4, R^(i) represents alkyl or benzyl and n is 1 or 2.

The esters of formula Iv-1 can be treated with paraformaldehyde in the presence of a base such as TEA or K₂CO₃. The resulting alcohols of formula Iv-2 can be activated using general reaction technique 3 and cyclised under thermal conditions. The resulting esters of formula Iv-3 can be reduced using general reaction technique 5, affording the alcohols of formula Iv-4, which can be activated using general reaction technique 3, affording the compounds of formula V wherein n is 1. The carbanions of the esters of formula IV-1, generated in the presence of LDA in THF at −78° C., can also be treated with 4-(iodomethyl)-2,2-dimethyl-1,3-dioxolane (commercial), affording the esters of formula IV-5, which can be further transformed into the corresponding alcohols of formula IV-6 using general reaction technique 5. These alcohols can be activated using general reaction technique 3 and cyclised under thermal conditions, affording the tricyclic derivatives of formula IV-7. The acetonide protecting group can be removed under acidic conditions such as aq. acetone in presence of diluted aq. HCl, or an acidic cation exchange resin such as Amberlite® IR120. The corresponding diols can be cleaved in presence of NaIO₄ to yield the corresponding aldehydes, which can be reduced into the corresponding alcohols of formula IV-8 by treatment with a hydride reagent such as NaBH₄, followed by alcohol activation using general reaction technique 3, affording the compounds of formula V wherein n is 2. The compounds of formulae IV-3, IV-4, IV-7, IV-8 and V wherein “-----” is absent and U represents CH₂ or NH can be obtained by hydrogenation of the corresponding compounds of formulae IV-3, IV-4, IV-7, IV-8 and V wherein “-----” is a bond and U represents CH or N. The compounds of formulae IV-4, IV-7, IV-8 and V wherein “-----” is a bond and U represents N can also be reduced into the corresponding compounds wherein “-----” is absent and U represents NH using NaBH₄, whereby the transformation of the compounds of formula IV-4 wherein U represents NH into the corresponding compounds of formula V is then preferably performed after transient protection of the NH group.

The compounds of formula V wherein R⁴ represents OH can be prepared as described in Scheme 4a hereafter.

The compounds of formula V wherein R⁴ is OH and n is 1 can be obtained (Scheme 4a) by transforming the compounds of formula IV-4 into the alkene derivatives of formula IVa-1 after activation of the alcohol group using general reaction technique 3 followed by treatment with a base such as DBU. The intermediate alkene derivatives of formula IVa-1 can be dihydroxylated using general reaction technique 6 and the primary alcohol function of the intermediates of formula Ib-1 can then be activated using general reaction technique 3, affording the compounds of formula V wherein R⁴ is OH and n is 1. The compounds of formula V wherein R⁴ is OH and n is 2 can be obtained by oxidizing the derivatives of formula Ib-1 using general reaction technique 9, performing a Wittig reaction with methoxymethylene triphenylphosphorane and an acidic hydrolysis of the intermediate of formula IVa-3 and reducing the aldehyde thus obtained into the alcohol derivatives of formula Ib-2 using general reaction technique 5 before activating the alcohol function using general reaction technique 3. The compounds of formula Ib-2 can also be obtained by reaction of the aldehydes of formula IVa-2 with methylenetriphenylphosphorane followed by hydroboration of the intermediate vinyl derivatives of formula IVa-4 with a borane reagent such as 9-BBN, BH₃.Me₂S or BH₃.THF followed by oxidation with H₂O₂ in presence of NaOH.

The compounds of formulae IVa-2 and V wherein “-----” is absent and U represents CH₂ or NH can be obtained by hydrogenation of the corresponding compounds wherein “-----” is a bond and U represents CH or N.

The compounds of formula VII can be obtained by oxidation of the corresponding alcohols of formulae Ib-1, Ib-2, IV-4 and IV-8 following general reaction technique 9.

The compounds of formula VIII wherein R²⁰ represents CH₂R³′, each of R⁴ and R⁵ represents H and p is 1, 2 or 3 can be obtained as described in Scheme 5 hereafter.

In Scheme 5, Hal represents halogen such as chlorine or bromine, R²⁰ represents CH₂R³′ and R³′ represents hydrogen or (C₁-C₃)alkyl or also R³′ represents a (C₁-C₃)hydroxyalkyl group the hydroxy of which is protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS ether).

The amine derivatives of formula XIII wherein each of R⁴ and R⁵ represents H can be reacted with the halogenides of formula V-1 following general reaction technique 1. The resulting derivatives of formula V-2 can be dihydroxylated following general reaction technique 6, the primary alcohol function can be activated following general reaction technique 3 and the epoxide ring can then be formed after treatment with a base such as NaH, Na₂CO₃ or TEA. The epoxides of formula V-3 can then be treated with sodium azide followed by formation of the corresponding amines following general reaction technique 12 and subsequently be converted into their corresponding carbamates with CbzCl or Boc₂O following general reaction technique 10. The oxazolidinone ring can then be formed by reaction with NaH. The compounds of formula VIII can also be obtained by reaction of the epoxide derivatives of formula V-3 with a carbamic acid ester in the presence of a salen complex as described in Org. Letters (2004), 6, 3973-3975 or Org. Letters (2005), 7, 1983-1985). The compounds of formula VIII wherein U is CH₂ or NH and “-----” is absent, can be obtained by hydrogenation of the corresponding compounds of formula VIII wherein “-----” is a bond and U represents CH or N. The compounds of formula VIII wherein “-----” is a bond and U represents N can also be reduced into the corresponding compounds wherein “-----” is absent and U represents NH using NaBH₄.

Certain compounds of formula IX are commercially available (e.g. G=G¹, Q=O and X=N: CAS 337463-99-7; G=G¹, Q=S and X=CH: CAS 6376-70-1; G=G¹, Q=O and X=CH: CAS 7652-29-1) or can be obtained according to known literature procedures (e.g. 7-chloro-1,8-naphthyridin-2(1R)-one: J. Org. Chem. (1990), 4744-59).

The compounds of formula IX wherein L³ is Cl, G is a group G¹, X is N and Q is S can be obtained as described in Scheme 6 hereafter.

Accordingly, the bromo derivative of formula VI-1 (prepared according to WO 2008/065198) can be reacted with bromoacetyl bromide and the resulting derivative of formula VI-2 can be reacted with sodium thioacetate in presence of NaOMe to afford the compound of formula IX wherein L³=Cl, G=G¹, X=N and Q=S.

The compounds of formula X wherein A′ represents —(CH₂)_(p)— are compounds of formula I wherein R² represents H. The compounds of formula X wherein A′ represents —CH₂CH₂CH(OPG)- can be obtained by reacting compounds of formula II wherein n is 0 with compounds of formula IV wherein A′ represents —CH₂CH(OPG)- using general reaction technique 2.

The compounds of formula XI can be prepared by activation of the corresponding commercially available alcohol derivatives (e.g. 3-[(tert-butyldimethylsilyl)oxy]-1-propanol or 2-tert-butyldimethylsilyloxyethanol) following general reaction technique 3.

The compounds of formula XII (e.g. (tert-butyldimethylsilyloxy)acetaldehyde or 3-[(tert-butyldimethylsilyl)oxy]propionaldehyde) and XIIa are commercially available.

The compounds of formula XIII wherein R³′ represent H or (C₁-C₃)alkyl or also R³′ represents a (C₁-C₃)hydroxyalkyl group, the hydroxy of which is protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS ether), can be prepared by reductive amination of the aldehydes of formula XII with the amines of formula II following general reaction technique 2. These compounds of formula XIII can also be obtained by alkylation of the amines of formula II with the derivatives of formula XI following general reaction technique 1.

The compounds of formula XIV wherein A′ represents —(CH₂)_(p-1)— can be prepared by oxidation of the compounds of formula II-2 or IV following general reaction technique 14. The compounds of formula XIV wherein A′ represents —CH₂CH(OPG)-, PG being a silyl protecting group such as TBDMS or TBDPS, can be prepared by hydrolysis of the corresponding esters of formula III-2 (see Scheme 3) using a base such as LiOH in the case wherein R^(h) is methyl or ethyl or TFA in the case wherein R^(h) is tBu.

The compounds of formula XV wherein R³′ represents hydrogen or (C₁-C₃)alkyl or also R³′ represents a (C₁-C₃)hydroxyalkyl group, the hydroxy of which is protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS ether), can be obtained by alkylation of the amines of formula VI with derivatives of formula R³′-CH₂—X (X being Cl, Br or I) following general reaction technique 1.

The compounds of formula XVI can be obtained from the corresponding compounds of formula I wherein R⁵ represents (CH₂)_(z)OH following general reaction technique 3.

The compounds of formula XVII can be obtained as described in Scheme 6a hereafter.

In Scheme 6a, PG⁰ represents an amino protecting group such as Ac, Boc, Cbz or Fmoc and R⁹″ represents hydrogen or (C₁-C₂)alkyl or also R⁹″ represents a (C₁-C₂)hydroxyalkyl group, the hydroxy of which is protected in the form of a silyl ether (e.g. as a TBDMS or TBDPS ether).

The compounds of formula I_(6a) (i.e. the compounds of formula I wherein “-----” is a bond, R⁰ is H, U is N and R² is H) can be protected with an amino protecting group PG⁰ using general reaction technique 10. The resulting compounds of formula 6a-1 can be transformed into the derivatives of formula 6a-2 by reduction over a noble metal catalyst such as Pd/C or reduced with a hydride reagent such as NaBH₄. The intermediates of formula 6a-2 can be reacted with the aldehydes of formula 6a-3 following general reaction technique 2, yielding the compounds of formula XVII. Alternatively, the compounds of formula 6a-2 can be transformed into the compounds of formula XVII by reaction with the alkyl halogenides of formula R⁹′-Hal (Hal being a halogen atom).

Preparation of the Intermediates of Formulae I-1, Ia-1, Id-1, Id-6, Ie-1, II-1, III-1, IV-1 and XIII:

The compounds of formula I-1 can be obtained from the compounds of formula IV-1 as described in Scheme 7 hereafter.

In Scheme 7, R^(j) is alkyl or benzyl.

The esters of formula IV-1 can be reacted (Scheme 7) with bromoacetonitrile in the presence of a strong base such as LiHMDS in a solvent such as THF between −78° C. and −20° C. The resulting nitrile derivatives of formula VII-1 can be reduced with LAH in a solvent such as THF or ether and the amino group of the resulting compounds of formula VII-2 can be protected according to general reaction technique 10, affording compounds of formula I-1 wherein n is 2. The esters of formula IV-1 can also be reacted with N-(bromomethyl)phthalimide in presence of a strong base such as LiHMDS in a solvent such as THF between −78° C. and −20° C. The resulting phthalimido derivatives of formula VII-3 can then be treated with an hydrazine derivative such as hydrazine hydrate, affording the corresponding primary amine derivatives of formula VII-4 wherein n is 1. The amino group of the derivatives of formula VII-4 can be protected according to general reaction technique 10 and the ester function reduced using general reaction technique 5 to obtain the compounds of formula I-1 wherein n is 1. The esters of formula IV-1 can also be reacted with NBS, affording the corresponding bromides of formula VII-5 which can then be reacted with potassium phthalimide. The resulting phthalimido derivatives of formula VII-6 can be treated with an hydrazine derivative such as hydrazine hydrate to obtain the corresponding primary amine derivatives of formula VII-4 wherein n is 0. The amino group of the derivatives of formula VII-4 can then be protected according to general reaction technique 10 and the ester function reduced using general reaction technique 5, affording compounds of formula I-1 wherein n is 0.

The compounds of formula I-1 wherein n is 0 can furthermore be obtained from the compounds of formula III-2 as described in Scheme 7a hereafter.

In Scheme 7a, PG¹ represents an amino protecting group such as Boc or Fmoc and PG⁵ represents an alcohol protecting group such as TBDMS or TBDPS.

The compounds of formula I-1 wherein n is 0 can also be obtained (Scheme 7a) from the alkene derivatives of formula III-2. The primary alcohol function of the diols of formula III-2 can be protected using general reaction technique 7 before conversion of the secondary alcohol group into the corresponding azide by activation of the alcohol under Mitsunobu conditions (in the presence of PPh₃ and DEAD or DIAD in a solvent such as THF, DMF, DCM or DME between −20° C. and 60° C., as reviewed by O. Mitsunobu in Synthesis (1981), 1) reaction with DPPA, formation of the primary amine using general reaction technique 12 and formation of the carbamate using general reaction technique 10, to obtain the compounds of formula VIIa-1. The alcohol protecting group of the intermediates of formula VIIa-1 can then be removed using general reaction technique 8.

The compounds of formula Ia-1 can be obtained from the aldehydes of formula VIII-2

by Wittig reaction with an alkoxycarbonylmethylene triphenylphosphorane.

The compounds of formula Id-1 can be prepared according to WO 02/08224, WO 2004/058144 or WO 2008/126024 or as described in Scheme 8 hereafter.

In Scheme 8, L⁵ represents halogen (such as bromine) or OTf.

The compounds of formula VIII-1 (see Scheme 8) can be reacted with trivinylboroxin in presence of a palladium catalyst such as tetrakis(triphenylphosphine)palladium, affording the compounds of formula Id-1 wherein R⁰ represents H. The compounds of formula Id-1 (including those wherein R⁰ represents (C₁-C₃)alkoxy) can also be obtained by reacting the aldehydes of formula VIII-2 with methylenetriphenylphosphorane.

The compounds of formula Id-6 can be obtained in analogy to the compounds of formula Id-1 starting from the derivatives of formula VIII-3

(commercially available or prepared according to WO 2008/148867, WO 2008/003690, WO 2006/125974 or WO 2008/150827).

The compounds of formula Ie-1 can be obtained by protection of the amino group of the corresponding compounds of formula II wherein R¹ represents halogen using general reaction technique 10.

The compounds of formula II-1 wherein p is 1 and PG⁴ is —C(O)R^(g), R^(g) being alkyl, are commercially available. The compounds of formula II-1 wherein p is 2 or 3 and PG⁴ is TBDMS can be prepared according to WO 2007/144423 or EP 518672.

The compounds of formula III-1 wherein PG is TBDMS can be prepared according or in analogy to Bioorganic & Medicinal Chemistry Letters (1996), 6(8), 991-994.

The compounds of formula IV-1 can be prepared as described in WO 2007/122258, WO 2007/115947 and WO 2007/081597.

The compounds of formula VIII-1 wherein R¹ is H and L⁵ is OTf can be prepared according to WO 2004/002490. The compounds of formula VIII-1 wherein R¹ is F can be prepared in analogy to the compounds of formula VIII-1 wherein R¹ is Cl as described in WO 2006/021448.

The compounds of formula VIII-2 wherein R⁰ is H or methoxy, R¹ is H or F and one of U and V is CH while the other is CH or N can be prepared according to WO 98/17672, WO 2006/046552, WO 2008/126024 or WO 2008/152603.

The compounds of formula VIII-2 wherein U is N, V is N and R⁰ is H or methoxy can be prepared as described in Scheme 9 hereafter.

In Scheme 9, X represents halogen such as bromine or chlorine.

The diamino derivatives of formula IX-1 can be reacted with bromoacetic acid, affording the intermediates of formula IX-2 which can then be oxidised using MnO₂. The aromatic intermediates of formula IX-3 can be reacted with methyl iodide in the presence of CsCO₃, affording the compounds of formula IX-7 wherein R⁰ is H. The compounds of formula IX-7 wherein R⁰ is OMe can be obtained by reacting the compounds of formula IX-1 with diethyl glyoxylate, affording the intermediates of formula IX-5 which can further be transformed into the derivatives of formula IX-6 by reaction with POCl₃ and the derivatives of formula IX-7 wherein R⁰ is OMe after reaction with NaOMe in MeOH. The compounds of formula IX-7 can then be transformed into the derivatives of formula VIII-2 after reaction with a strong base such as n-BuLi and trapping the generated intermediates with DMF.

The compounds of formula IX-1 wherein R¹ is H can be prepared as described in U.S. Pat. No. 5,298,518. The compound of formula IX-1 wherein X is Br and R¹ is F can be obtained as summarised in Scheme 10 hereafter.

The commercially available pyridine derivative of formula X-1 can be transformed into the corresponding aminopyridine derivative of formula X-2 by reaction with POCl₃ followed by ammonia. The intermediate of formula X-2 can then be reacted with HNO₃/AcOH and further reduced (e.g. with Zn/HCl), thus affording the compound of formula IX-1 wherein X is Br and R¹ is F.

Particular embodiments of the invention are described in the following Examples, which serve to illustrate the invention in more detail without limiting its scope in any way.

EXAMPLES

All temperatures are stated in ° C. Compounds are characterized by ¹H-NMR (300 MHz) (Varian Oxford); or by ¹H-NMR (400 MHz) (Bruker Advance 400). Chemical shifts

are given in ppm relative to the solvent used; multiplicities: s=singlet, d=doublet, t=triplet, q=quadruplet, p=pentuplet, hex=hexet, hep=heptet, m=multiplet, br.=broad, coupling constants are given in Hz. Alternatively compounds are characterized by LC-MS (Sciex API 2000 with Agilent 1100 Binary Pump with DAD and ELSD or an Agilent quadrupole MS 6140 with Agilent 1200 Binary Pump, DAD and ELSD); by TLC (TLC plates from Merck, Silica gel 60 F₂₅₄); or by melting point. Compounds are purified by chromatography on Silica gel 60A. NH₄OH as used for CC is 25% aq.

The HPLCs are done over a stationary phase such as a rapid resolution Zorbax SB C18 (1.8 μm) column, or a rapid resolution Zorbax Eclipse Plus C18 (1.8 μm) column. Typical HPLC conditions are a gradient of eluent A (water:MeCN 95:5 with 0.1% of formic acid, in presence or not of 5 mmol/L ammonium formate) and eluent B (MeCN:water 95:5 with 0.1% of formic acid, in the presence or not of 5 mmol/L ammonium formate), at a flow rate of 0.8 to 5 mL/min. Racemates can be separated into their enantiomers as described before. Preferred conditions of chiral HPLC are: ChiralPak AD (4.6×250 mm, 5 μm) column, using an isocratic mixture (e.g. at a ratio of 10/90) of eluent A (EtOH, in presence of diethylamine in an amount of eg. 0.1%) and eluent B (Hex), at rt, at a flow rate of e.g. 0.8 mL/min.

General Procedures: Procedure A: LAH Reduction of Esters:

To a solution of ester (1 mmol) in THF (15 mL), cooled to −10° C., is added in one portion LAH (3.5 eq.). The mixture is stirred at the same temperature for 0.5 h, then at 0° C./rt until completion of the reaction (1-3 h). Water (0.4 mL) is carefully added, followed by 2M NaOH (0.8 mL) and water (0.4 mL). After stirring for 5 min, Na₂SO₄ (1 g) is added and the mixture is stirred for 15 min. The solids are filtered off and thoroughly washed with EA. The filtrate is concentrated under reduced pressure.

Procedure B: Boc Deprotection:

The Boc protected amine (1 mmol) is dissolved in DCM (5 mL) and treated with Et₃SiH (optional; 0.2 mL, 1.1 eq.) and TFA (2 mL). The mixture is stirred at rt for 1 h, concentrated in vacuo and taken up in DCM/aq. NH₄OH. The org. layer is washed with water, dried over MgSO₄ and concentrated under reduced pressure.

Procedure C: Alkylation of Amines with Mesylates:

A solution of amine (1.0-2.3 mmol), mesylate (1 mmol) and DIPEA (1.1 mmol) in dry DMSO is heated to 70° C. until completion of the reaction (1-5 days). After cooling, water and EA are added and the phases are separated. The aq. layer is extracted two more times with EA and the combined org. layers are washed with water (3×) and brine, dried over MgSO₄ and concentrated under reduced pressure. The residue is then purified by CC.

Procedure D: Alkylation of Amines with Iodides:

A solution of amine (1 mmol), iodide (1 mmol) and DIPEA (1.1 mmol) in dry DMSO is heated to 70° C. until completion of the reaction (1-3 days). After cooling, water and EA are added and the phases are separated. The aq. layer is extracted two more times with EA and the combined org. layers are washed with water (3×) and brine, dried over MgSO₄ and concentrated under reduced pressure. The residue is then purified by CC.

Procedure E: Reductive Amination:

A solution of amine (1 mmol) and aldehyde (1 mmol) in DCE/MeOH (1-1 to 4-1, 10 mL) is treated with NaBH(OAc)₃ (2 mmol). The mixture is stirred at rt until completion of the reaction (1-4 h), diluted with DCM and treated with aq. NH₄OH. The phases are separated. The aq. layer is extracted two more times with DCM and the combined org. layers are washed with water and brine, dried over MgSO₄ and concentrated under reduced pressure. The residue is then purified by CC.

Procedure F: Hydrogenation:

A solution of unsaturated substrate (1 mmol) in MeOH (20 mL) and AcOH (optional, 20 mL) is hydrogenated over 10% Pd/C (200 mg) for 20 h. The catalyst is filtered off, washed with MeOH/DCM and concentrated. Water and 28% aq. NH₄OH are added and the mixture is extracted with DCM/MeOH 9:1. The org. layer is dried over MgSO₄, concentrated and purified by CC.

Procedure G: Boc Protection:

Boc₂O (1.05 eq.) and TEA (1.5 eq.) are added at rt to a solution of the corresponding amine (1.0 eq.) in THF. The reaction mixture is stirred at rt for 1 h, concentrated to dryness and purified by CC.

Procedure H: Mesylate Formation:

TEA or DIPEA (2 eq.) and MsCl (1.2 eq.) are added at 0° C. to a solution of the required alcohol (1 eq.) in DCM or DCE. The reaction is stirred 1 h at this temperature. In the case the resulting mesylate can undergo cyclization to form a tricyclic system, the reaction mixture is further stirred between rt and 45° C. for 6 to 72 h. Sat. aq. NaHCO₃ is then added and the mixture is extracted with DCM (3×). The combined org. layers are dried over MgSO₄, filtered and concentrated under reduced pressure to afford the desired mesylate which can be used as such in a further step.

Procedure I: Oxazolidinone Formation with CDI:

A solution of the required aminoalcohol (1 eq.) in THF is treated with CDI (1.5 eq.) and heated at 50° C. overnight. The mixture is cooled to rt, diluted with EA and washed with water. The org. layer is washed with 0.5M HCl (optionally) and water, dried over MgSO₄ and concentrated. The residue is either triturated with an org. solvent, crystallized from Hept/EA or purified by CC.

Procedure J: Deprotection of TBDMS Ethers:

A solution of TBDMS ether (1 eq) in THF is treated with TBAF (1M solution in THF, 1.2 eq.) at 0° C. The solution is stirred at 0° C. for 6 h. The mixture is partitioned between water and EA and the aq. phase is extracted with EA (3×). The combined org. layers are washed with water (3×) and brine, dried over MgSO₄ and concentrated under reduced pressure. The residue is triturated with an org. solvent or purified by CC.

Procedure K: Finkelstein-Like Iodide Formation:

A suspension of the mesylate (1 eq.) and NaI (3 eq.) in 2-butanone is heated at 85° C. between 3 h and 3 days. After cooling, the mixture is diluted with ether/EA and treated with 10% aq. Na₂S₂O₃. After stirring for 10 min, the phases are separated and the aq. layer was washed with EA. The combined org. layers are washed with water (2×), dried over MgSO₄ and concentrated under reduced pressure. The residue is triturated with an org. solvent.

Procedure L: Asymmetric Dihydroxylation (Chem. Rev. (1994), 94, 2483):

A mixture of olefin (1 mmol) in t-BuOH/H₂O (1:1, 10 mL) at rt is treated with methylsulfonamide (1 eq.) and AD-mix α or β (1.5 g). The mixture is vigorously stirred at rt until completion of reaction, Na₂S₂O₃ (1.5 g) is added and the mixture diluted with EA (30 mL). The phases are separated and the aq. phase is extracted once more with EA. The combined org. layers are washed with water and brine, dried over MgSO₄ and concentrated. The residue is purified by CC.

Procedure M: TBDMS Protection:

A solution of alcohol (1 eq.) and imidazole (1.1 eq.) in THF (10 mL/mmol) at 0° C. is treated dropwise with a solution of TBDMSCl (1 eq.) in THF. The mixture is stirred at rt until complete conversion. The mixture is diluted with EA, washed with water and brine, dried over MgSO₄ and concentrated. The residue is purified by CC.

Procedure N: Mitsunobu Reaction:

To a solution of alcohol (1 eq.) and PPh₃ (1.1 eq.) in THF (2 ml/mmol) cooled to 0° C., DPPA (1.1 eq.) and DIAD (1.2 eq.) are added dropwise and the mixture warmed to rt over 1 h and stirred at this temperature until completion of reaction. The mixture is concentrated under reduced pressure and the residue purified by CC.

Procedure N′: Mitsunobu Reaction with Staudinger Conditions and Boc Protection:

After performing procedure N with the alcohol (1 eq.) as previously described, the azide is dissolved in THF/water (9:1) and treated with PPh₃ (1.2 eq.) and the resulting solution heated at 50° C. until complete conversion to the amine. The mixture is cooled an treated with Boc₂O (1.5 eq) and stirred at rt overnight. The volatiles are removed under reduced pressure and the residue purified by CC to give the Boc-protected amine.

Preparation A: rac-1-aminomethyl-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one A.i. (7-fluoro-2-methoxy-quinolin-8-yl)-acetonitrile

To a solution of 8-bromomethyl-7-fluoro-2-methoxy-quinoline (20.0 g, 74 mmol; prepared as in WO 2007/081597) in DMF (530 mL) was added KCN (22.1 g, 339 mmol) and the mixture was stirred at 70° C. overnight. The mixture was concentrated, water and EA were added and the aq. layer was extracted with EA. The combined org layers were washed with brine, dried over MgSO₄ and concentrated to afford the title intermediate as a beige solid (16.13 g, 100% yield).

MS (ESI, m/z): 217.4 [M+H⁺].

A.ii. (7-fluoro-2-methoxy-quinolin-8-yl)-acetic acid methyl ester

To a solution of intermediate A.i (16.1 g, 75 mmol) in MeOH (270 mL) was added TMSCl (32 mL, 3.38 eq) and the solution was stirred at 80° C. for 3 h. The mixture was concentrated under reduced pressure and partitioned between EA and water. The phases were separated and the aq. layer was extracted with EA. The combined org. layers were washed with 2MNaOH, water and brine, dried over MgSO₄, concentrated and purified by CC (DCM) to afford the title intermediate as a colourless solid (8.13 g, 44% yield).

MS (ESI, m/z): 250.2 [M+H⁺].

A.iii. rac-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-2-(7-fluoro-2-methoxy-quinolin-8-yl)-propionic acid methyl ester

To a solution of LiHMDS (31.3 mL, 1M in THF) in THF (40 mL) was added at −78° C. a solution of intermediate Ali (6.50 g, 26 mmol) in THF (50 mL) over 10 min. After stirring for 1 h at −78° C., a solution of N-(bromomethyl)phthalimide in THF (50 mL) was added dropwise over 10 min. The mixture was stirred at −78° C. for 1 h and then at rt overnight. The resulting solution was quenched with 1N HCl (260 mL) and extracted with DCM. The combined org. layers were washed with water, dried over MgSO₄, concentrated and purified by CC (Hept/EA 1:1). The resulting solid was triturated with EA to afford the title intermediate as a colourless solid (2.42 g, 23% yield).

MS (ESI, m/z): 409.3 [M+H⁺].

A.iv. rac-3-amino-2-(7-fluoro-2-methoxy-quinolin-8-yl)-propionic acid methyl ester

To a suspension of intermediate A.iii (2.40 g, 5.88 mmol) in EtOH (40 mL) was added dropwise hydrazine monohydrate (1.43 mL, 5 eq.) at rt. The mixture was stirred for 2 h at rt and then concentrated. The residue was taken up in EA and 10% citric acid and the layers were separated. The aq. phase was treated another time with EA. The aq. phase was basified with NH₄OH and extracted twice with DCM. The combined DCM phases were dried over MgSO₄ and concentrated to afford the title intermediate as a pale yellow oil (1.62 g, 99% yield).

MS (ESI, m/z): 279.4 [M+H⁺].

A.v. rac-3-tert-butoxycarbonylamino-2-(7-fluoro-2-methoxy-quinolin-8-yl)-propionic acid methyl ester

Starting from intermediate A.iv (1.62 g, 5.82 mmol) and using procedure G, the title intermediate was obtained as a colourless solid (1.87 g, 85% yield).

MS (ESI, m/z): 379.2 [M+H⁺].

A.vi. rac-[2-(7-fluoro-2-methoxy-quinolin-8-yl)-3-hydroxy-propyl]-carbamic acid tert-butyl ester

Starting from intermediate A.v and using procedure A, the title intermediate was obtained as a colourless solid (1.69 g, 98% yield).

MS (ESI, m/z): 351.3 [M+H⁺].

A.vii. rac-(9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-ylmethyl)-carbamic acid tert-butyl ester

Starting from intermediate A.vi (1.68 g, 4.8 mmol) and using procedure H, the title intermediate was obtained as a beige solid (1.56 g, 100% yield).

MS (ESI, m/z): 319.3 [M+H⁺].

A.viii. rac-1-aminomethyl-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate A.vii and using procedure B, the title compound was obtained as a pale orange solid (1.08 g, quant.).

¹H NMR (CDCl₃) δ: 7.66 (d, J=9.4 Hz, 1H), 7.40 (dd, J=8.8, 4.7 Hz, 1H), 6.88 (m, 1H), 6.61 (d, J=9.4 Hz, 1H), 4.53 (dd, J=12.9, 9.4 Hz, 1H), 4.36 (dd, J=12.9, 4.7 Hz, 1H), 3.95 (m, 1H), 1.97 (m, 2H), 3.15 (m, 2H).

MS (ESI, m/z): 219.2 [M+H⁺].

Preparation B: rac-1-(2-amino-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one B.i. rac-3-cyano-2-(7-fluoro-2-methoxy-quinolin-8-yl)-propionic acid methyl ester

LiHMDS (18.4 mL, 1.1 eq., 1M in THF) was added at −78° C. within 15 min to a solution of intermediate A.ii (4.17 g, 16.7 mmol) in THF (40 mL). The resulting mixture was stirred at −78° C. for 2 h. Bromoacetonitrile (3.0 g, 1.5 eq.) was added within 20 min and stirring was continued at −78° C. for 2 h. The reaction was quenched with water and extracted with EA (3×). The combined org. phases were washed with brine, dried over MgSO₄, filtered and concentrated. The residue was purified by CC (Hept/EA 2:1 to 1:1) to afford the title intermediate as a yellow solid (3.96 g, 82% yield).

MS (ESI, m/z): 289.4 [M+H⁺].

B.ii. rac-4-amino-2-(7-fluoro-2-methoxy-quinolin-8-yl)-butan-1-ol

To a solution of AlCl₃ (4.0 g, 30 mmol) in ether (150 mL) were added LAH (30 mL, 1M in THF) dropwise within 10 min at −78° C. After stirring for 15 min, a suspension of intermediate B.i (3.94 g, 13.7 mmol) in ether (120 mL) was added within 15 min. The suspension was then stirred at rt for 4 h, cooled to 0° C., quenched with sat. aq. Na₂SO₄. The mixture was basified with NH₄OH and extracted with EA (3×). The combined org. phases were dried over Na₂SO₄, filtered and concentrated to afford the title intermediate as a yellow oil (3.86 g, quant.) which was used as such in the next step.

MS (ESI, m/z): 265.4 [M+H⁺].

B.iii. rac-[3-(7-fluoro-2-methoxy-quinolin-8-yl)-4-hydroxy-butyl]-carbamic acid tert-butyl ester

Starting from intermediate B.ii (3.85 g, 14.57 mmol) and using procedure G, the title intermediate was obtained as a yellow oil (2.69 g, 51% yield).

MS (ESI, m/z): 365.1 [M+H⁺].

B.iv. rac-[2-(9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate B.iii (2.68 g, 7.4 mmol) and using procedure H, the title intermediate was obtained as a pale orange solid (2.67 g, quant.) which was used as such in the next step.

MS (ESI, m/z): 333.1 [M+H⁺].

B.v. rac-1-(2-amino-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate B.iv and using procedure B, the title compound was obtained after CC (DCM/MeOH/NH₄OH 1000:50:4) as a pale orange solid (1.34 g, 72% yield).

¹H NMR (CDCl₃) δ: 7.68 (d, J=9.3 Hz, 1H), 7.40 (dd, J=8.8, 4.8 Hz, 1H), 6.89 (m, 1H), 6.63 (d, J=9.5 Hz, 1H), 4.56 (dd, J=12.8, 9.3 Hz, 1H), 4.21 (dd, J=12.5, 4.8 Hz, 1H), 4.00 (m, 1H), 2.89 (m, 2H), 2.18 (m, 1H), 1.86 (m, 1H), 1.24 (m, 2H).

MS (ESI, m/z): 233.5 [M+H⁺].

Preparation C: rac-1-amino-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one C.i. rac-bromo-(7-fluoro-2-methoxy-quinolin-8-yl)-acetic acid methyl ester

NBS (1.6 g) and AIBN (0.1 g) were added to a mixture of intermediate A.ii (1.50 g, 6.0 mmol) in trifluorotoluene (30 mL). The mixture was heated at 80° C. under a sunlamp beam for 5 h. After cooling, the reaction mixture was concentrated. The residue was taken in EA and washed twice with 10% sodium thiosulfate, dried over Na₂SO₄, filtered and concentrated to dryness. The residue was triturated with Hept/EA to afford the title intermediate as a colourless solid (1.42 g, 72% yield).

MS (ESI, m/z): 328.2 [M+H⁺].

C.ii. rac-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-(7-fluoro-2-methoxy-quinolin-8-yl)-acetic acid methyl ester

To a solution of intermediate C.i (1.31 g, 4.0 mmol) in dry DMF (25 mL) was added potassium phthalimide (1.24 g, 6.6 mmol) under Ar. The resulting solution was stirred at 120° C. for 1 h. After cooling to rt, water was added and the mixture was extracted with EA. The org. layer was washed with water and brine, dried over MgSO₄ and concentrated. The residue was crystallized from Hept/EA to afford the title intermediate as a beige solid (1.04 g, 66% yield).

MS (ESI, m/z): 395.1 [M+H⁺].

C.iii. rac-amino-(7-fluoro-2-methoxy-quinolin-8-yl)-acetic acid methyl ester

To a solution of intermediate C.ii (714 mg, 1.81 mmol) in EtOH (10 mL) was added dropwise hydrazine monohydrate (0.9 mL, 10 eq.) at rt. The mixture was stirred for 3 h at rt, after which a precipitate had formed, which was filtered off. The filtrate was concentrated under reduced pressure and partitioned between EA and 10% citric acid. The aq. layer was washed once more with EA and then basified using NH₄OH. The aq. layer was extracted with DCM and the org. layer was concentrated under reduced pressure to afford the title intermediate as a colourless solid (398 mg, 83% yield).

MS (ESI, m/z): 265.5 [M+H⁺].

C.iv. rac-tert-butoxycarbonylamino-(7-fluoro-2-methoxy-quinolin-8-yl)-acetic acid methyl ester

Starting from intermediate C.iii (380 mg, 1.44 mmol) and using procedure G, the title intermediate was obtained as a colourless solid (560 mg, 100% yield).

MS (ESI, m/z): 365.0 [M+H⁺].

C.v. rac-[7-(7-fluoro-2-methoxy-quinolin-8-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate C. iv and using procedure A, the title intermediate was obtained as a pale yellow solid (473 mg, 92% yield).

MS (ESI, m/z): 337.3 [M+H⁺].

C.vi. rac-(9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

TEA (0.4 mL, 2 eq.) and MsCl (0.13 mL, 1.2 eq.) were added at 0° C. to a solution of intermediate C.v (470 mg, 1.40 mmol) in DCM (10 mL). The reaction proceeded for 20 min at this temperature. Sodium bicarbonate and DCM were added. The two layers were decanted and the aq. layer was extracted once more with DCM. The combined org. layers were dried over Na₂SO₄, filtered and concentrated to dryness. The residue was carried on without further purification. A solution of the crude mesylate in toluene (20 mL) was heated at 85° C. overnight. After cooling to rt, water and EA were added and the layers separated. The aq. layer was extracted once more with EA and the combined org. layers were washed with saturated NaHCO₃ and concentrated. The residue was triturated with ether/EA to afford the title intermediate as a colourless solid (193 mg, 45% yield).

MS (ESI, m/z): 305.0 [M+H⁺].

C.vii. rac-1-amino-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate C.vi and using procedure B, the title compound was obtained as a beige solid (128 mg, 100% yield).

¹H NMR (DMSO-d₆) δ: 7.88 (d, J=9.4 Hz, 1H), 7.61 (dd, J=8.5, 5.0 Hz, 1H), 6.99 (dd, J=9.7, 8.8 Hz, 1H), 6.49 (d, J=9.4 Hz, 1H), 4.92 (dd, J=8.8, 4.4 Hz, 1H), 4.44 (dd, J=12.9, 8.8 Hz, 1H), 3.86 (dd, J=12.6, 3.8 Hz, 1H), 2.29 (s, 2H).

MS (ESI, m/z): 205.1 [M+H⁺].

Preparation D: (R)-4-amino-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one D.i. (R)-2-azido-2-(6-methoxy-[1,5]naphthyridin-4-yl)-ethanol and (S)-2-azido-1-(6-methoxy-[1,5]naphthyridin-4-yl)-ethanol

A mixture of (S)-2-methoxy-8-oxiranyl-[1,5]naphthyridine (4 g, 20 mmol; prepared as in WO 2006/002047), NH₄Cl (2.7 g, 2.5 eq) and NaN₃ (3.2 g, 2.5 eq.) in MeOH (100 mL) and water (2 mL) was heated at 65° C. for 4 h, filtered and concentrated in vacuo. The residue was taken up in EA and washed with sat. NaHCO₃ and brine, dried over MgSO₄ and concentrated. The residue was purified by CC (Hept/EA 1:1, 1:2, EA) to give a 3:2 mixture of regioisomers (5 g, 100% yield) which was used as such in the next step.

D.ii. [(R)-2-hydroxy-1-(6-methoxy-[1,5]naphthyridin-4-yl)-ethyl]-carbamic acid tert-butyl ester

A solution of intermediate D.i (mixture of isomers, 5 g, 20.7 mmol) in THF/MeOH 1:1 (200 mL) was hydrogenated over Pd/C (10%, 2.2 g) and 1 bar of H₂ for 1 h. The catalyst was filtered off and the filtrate concentrated under reduced pressure. The residue was dissolved in DCM (150 mL) and Boc₂O (6.8 g, 1.5 eq.) was added. The mixture was stirred at rt for 2 h, concentrated in vacuo and purified by CC (EA/Hept 2:1, EA, EA/MeOH 9:1) to give the more polar, desired isomer as a colourless foam (2.8 g, 43% yield).

¹H NMR (DMSO-d₆) δ: 8.72 (d, J=4.4 Hz, 1H), 8.24 (d, J=9.1 Hz, 1H), 7.56 (d, J=4.4 Hz, 1H), 7.33 (d, J=8.5 Hz, 1H), 7.25 (d, J=9.1 Hz, 1H), 5.64 (m, 1H), 3.99 (m, 3H), 3.78 (m, 1H), 3.58 (dd, J=10.8, 7.0 Hz, 1H), 1.35 (s, 9H).

D.iii. ((R)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-yl)-carbamic acid tert-butyl ester

Starting from intermediate D.ii (2.8 g, 8.8 mmol) and using procedure H, the title intermediate was obtained as an off-white solid (1.2 g, 47% yield) after CC (EA, EA/MeOH 9:1) and crystallisation from ether/EA.

MS (ESI, m/z): 288.4 [M+H⁺].

D.iv. (R)-4-amino-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

A solution of intermediate D.iii (1 g, 3.48 mmol) in dioxane was treated with 4N HCl in dioxane (4 mL). The beige suspension was stirred at rt overnight, filtered and washed with ether and dried to give the dihydrochloride (475 mg, 52% yield). The free base was generated with the use of ion exchange resin (Dowex 50), eluting with methanolic ammonia to give a beige solid (0.3 g).

¹H NMR (DMSO-d₆) δ: 8.55 (d, J=4.7 Hz, 1H), 7.99 (d, J=9.7 Hz, 1H), 7.65 (dd, J=4.7, 0.9 Hz, 1H), 6.82 (d, J=9.7 Hz, 2H), 5.12 (ddd, J=8.8, 4.1, 0.9 Hz, 1H), 4.53 (dd, J=13.2, 8.8 Hz, 1H), 4.05 (m, 3H).

Preparation E: rac-4-aminomethyl-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one E.i. 2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-malonic acid diethyl ester

Diethyl malonate (12.4 mL, 81.7 mmol) was added to a suspension of NaH (3.0 g, 47.9 mmol, 60% in mineral oil) in dioxane (35 mL). The mixture was stirred at rt for 5 min and then heated at 80° C. for 1 h. After cooling to rt, CuBr (1.4 g, 9.6 mmol) and 8-bromo-7-fluoro-2-methoxy-[1,5]naphthyridine (7.0 g, 27.2 mmol, prepared according to WO 2007/122258) were added. The mixture was stirred at 100° C. for 6 h. After cooling to rt, 10% NaHSO₄ (100 mL) was added. The mixture was stirred for 30 min at rt. The two layers were decanted and the aq. layer was extracted three times with EA (3×150 mL). The combined org. layers were washed with brine, dried over Na₂SO₄, filtered and concentrated to dryness. The residue was purified by CC (Hept-EA 3:1 then 1:1) to afford the title intermediate as a yellow oil (8.22 g, 90% yield).

MS (ESI, m/z): 337.3 [M+H⁺].

E.ii. (3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-acetic acid ethyl ester

Water (0.53 mL, 1.2 eq.) and LiCl (2.07 g, 2 eq.) were added to a solution of intermediate E.i (8.22 g, 24.4 mmol) in DMSO (170 mL). The mixture was heated to 110° C. for 16 h and another 2.34 g of LiCl were added. The mixture was further heated at 110° C. for 16 h. The solvent was then evaporated under reduced pressure (bath temperature=70° C., p=0.5 mbar). The residue was partitioned between 10% NaHSO₄ (200 mL) and ether (200 mL). The aq. layer was extracted with ether (2×200 mL). The combined org. layers were filtered through a pad of silica gel. The filtrate was concentrated to dryness to afford the title intermediate as a brown oil (5.62 g, 87% yield).

MS (ESI, m/z): 265.3 [M+H⁺].

E.iii. rac-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-propionic acid ethyl ester

To a solution of LiHMDS (4.54 mL, 1M in THF) in THF (11 mL) was added at −78° C. a solution of intermediate E.ii (1.0 g, 3.78 mmol) in THF (3 mL) over 10 min. After stirring for 1 h at −78° C. a solution of N-(bromomethyl)phthalimide (1.09 g, 1.2 eq.) in THF (4 mL) was added dropwise over 10 min. The mixture was stirred at −78° C. for 1 h and then at rt overnight. The resulting solution was quenched with 1N HCl and extracted with DCM. The combined org. layers were washed with water, dried over MgSO₄, concentrated and purified by CC (Hept/EA 1:1) to afford the title intermediate as an off-white solid (0.361 g, 43% yield).

MS (ESI, m/z): 424.4 [M+H⁺].

E.iv. rac-3-amino-2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-propionic acid ethyl ester

To a suspension of intermediate E.iii (368 mg, 0.87 mmol) in EtOH (6 mL) was added dropwise hydrazine monohydrate (0.21 mL, 5 eq.) at rt. The mixture was stirred for 2 h at rt and then concentrated. The residue was taken up in EA and 10% citric acid and the layers were separated. The aq. phase was treated another time with EA. The aq. phase was basified with NH₄OH and extracted twice with DCM. The combined DCM phases were dried over MgSO₄ and concentrated to afford the title intermediate as a yellow oil (0.21 g, 82% yield).

MS (ESI, m/z): 203.0 [M+H⁺].

E.v. rac-3-tert-butoxycarbonylamino-2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-propionic acid ethyl ester

Starting from intermediate E.iv (0.21 g, 0.72 mmol) and using procedure G, the title intermediate was obtained as a pale yellow foam (0.23 g, 83% yield).

MS (ESI, m/z): 394.2 [M+H⁺].

E.vi. rac-[2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-3-hydroxy-propyl]-carbamic acid tert-butyl ester

Starting from intermediate E.v (0.225 g, 0.57 mmol) and using procedure A, the title intermediate was obtained as a yellow foam (0.20 g, 100% yield).

MS (ESI, m/z): 202.2 [M+H⁺].

E.vii. rac-(3-fluoro-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl)-carbamic acid tert-butyl ester

Starting from intermediate E.vi (0.20 g, 0.57 mmol) and using procedure H, the title intermediate was obtained as a beige solid (0.204 g, quant.) which was used as such in the next step.

MS (ESI, m/z): 320.2 [M+H⁺].

E.viii. rac-4-aminomethyl-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate E.vii and using procedure B, the title compound was obtained as a brown oil (17 mg, 13% yield).

MS (ESI, m/z): 220.3 [M+H⁺].

Preparation F: rac-4-(2-amino-ethyl)-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one F.i. rac-3-cyano-2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-propionic acid ethyl ester

LiHMDS (4.2 mL, 1.1 eq., 1M in THF) was added at −78° C. within 15 min to a solution of intermediate E.ii (1.5 g, 5.68 mmol) in THF (15 mL). The resulting mixture was stirred at −78° C. for 2 h. Then bromoacetonitrile (1.02 g, 1.5 eq.) was added within 20 min and stirring was continued at −78° C. for 2 h. The reaction was quenched with water and extracted with EA (3×). The combined org. phases were washed with brine, dried over MgSO₄, filtered and concentrated. The residue was purified by CC (Hept/EA 1:1) to afford the title intermediate as a yellow oil (1.30 g, 76% yield).

MS (ESI, m/z): 304.2 [M+H⁺].

F.ii. rac-4-amino-2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-butan-1-ol

To a solution of AlCl₃ (1.3 g, 9.9 mmol) in ether (60 mL) were added LAH (9.9 mL, 1M in THF) dropwise within 10 min at −78° C. After stirring for 15 min a suspension of intermediate F.i (1.36 g, 4.50 mmol) in ether (50 mL) was added within 15 min. The suspension was then stirred for 1 h at −78° C. and for 1 h at −30° C. The mixture was then stirred for 2 h at 0° C., quenched with sat. aq. Na₂SO₄. The mixture was basified with NH₄OH and extracted with EA (3×). The combined org. phases were dried over Na₂SO₄, filtered and concentrated. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8) to afford the title intermediate as a yellow oil (0.30 g, 25% yield).

MS (ESI, m/z): 266.3 [M+H⁺].

F.iii. rac-[3-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-4-hydroxy-butyl]-carbamic acid tert-butyl ester

Starting from intermediate F.ii (424 mg, 1.60 mmol) and using procedure G, the title intermediate was obtained as a a yellow solid (360 mg, 62% yield).

MS (ESI, m/z): 366.2 [M+H⁺].

F.iv. rac-[2-(3-fluoro-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate F.iii (360 mg, 0.99 mmol) and using procedure H, the title intermediate was obtained as a brown solid (360 mg, quant.) which was used as such in the next step.

MS (ESI, m/z): 334.1 [M+H⁺].

F.v. rac-4-(2-amino-ethyl)-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate F.iv and using procedure B, the title compound was obtained after CC (DCM/MeOH/NH₄OH 1000:100:8) as a yellow solid (130 mg, 49% yield).

MS (ESI, m/z): 234.3 [M+H⁺].

Preparation G: rac-6-amino-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one G.i. rac-2-azido-2-(3-methoxy-quinoxalin-5-yl)-ethanol

A mixture of 2-methoxy-8-oxiranyl-quinoxaline (4.7 g, 23 mmol; prepared as in WO 2004/002490), NH₄Cl (2.2 g, 1.8 eq.) and NaN₃ (3.8 g, 2.5 eq.) in MeOH (60 mL) was heated at 65° C. for 5 h, filtered and concentrated in vacuo. The residue was taken up in EA and washed with sat. NaHCO₃ and brine, dried over MgSO₄ and concentrated. The residue was purified by CC (Hept/EA 1:1) to give the desired intermediate as a beige solid (4.4 g, 77% yield).

¹H NMR (CDCl₃) δ: 8.52 (s, 1H), 8.02 (dd, J=8.5, 1.5 Hz, 1H), 7.77 (dd, J=7.3, 1.5 Hz, 1H), 7.60 (m, 1H), 5.90 (dd, J=7.6, 4.1 Hz, 1H), 4.13 (s, 3H), 4.01 (dd, J=11.4, 3.8 Hz, 1H), 3.87 (dd, J=11.4, 7.9 Hz, 1H).

G.ii. rac-[2-hydroxy-1-(3-methoxy-quinoxalin-5-yl)-ethyl]-carbamic acid tert-butyl ester

A solution of intermediate G.i (4.48 g, 18.2 mmol) in THF (100 mL) and water (3.2 mL) was treated with PPh₃ (5.3 g, 1.1 eq) and heated at 50° C. for 2 h. The mixture was concentrated to dryness and redissolved in ether/EA. The org. phase was extracted twice with 1M HCl. The organic phase was discarded and the aqueous phase basified with 6N NaOH and extracted with DCM, dried over MgSO₄ and concentrated. The residue was dissolved in DCM (150 mL) and treated with Boc₂O (4.8 g, 1.2 eq.). The mixture was stirred at rt for 1 h, concentrated in vacuo and purified by CC (EA/Hept 2:1, EA) to give the desired intermediate as a colourless foam (4.9 g, 84% yield).

¹H NMR (DMSO-d₆) δ: 8.60 (s, 1H), 7.87 (dd, J=8.2, 1.5 Hz, 1H), 7.70 (m, 1H), 7.58 (m, 1H), 7.26 (m, 1H), 5.64 (td, J=7.6, 4.1 Hz, 1H), 4.76 (t, J=5.9 Hz, 1H), 4.06 (s, 3H), 3.71 (m, 1H), 3.54 (m, 1H), 1.35 (s, 11H).

G.iii. rac-(3-oxo-5,6-dihydro-3H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-carbamic acid tert-butyl ester

Starting from intermediate G.ii (4.47 g, 14 mmol) and following procedure H, the reaction mixture was refluxed in DCE (100 mL) for 3 days. The mixture was cooled to rt, diluted with DCM, washed with water, dried over MgSO₄ and concentrated. The residue was crystallized from ether/EA to give a mixture of the desired intermediate and the corresponding oxazolidinone as an off-white solid (2.2 g) which was used in the next step without further purification or characterization.

G.iv. rac-6-amino-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

A solution of intermediate G.iii (2.17 g, 3.8 mmol) in DCM (10 mL) was treated with TFA (5 mL). The mixture was stirred at rt for 1 h, concentrated in vacuo and partitioned between DCM and water. The org. phase containing impurities was discarded and the aq. phase basified with NH₄OH and extracted several times with DCM/MeOH 9:1. The combined org. phases were dried over MgSO₄ and concentrated to give the desired compound as an orange solid (0.36 g, 51% yield).

¹H NMR (DMSO-d₆) δ: 8.17 (s, 1H), 7.67 (d, J=8.2 Hz, 1H), 7.58 (dt, J=7.3, 0.9 Hz, 1H), 7.32 (dd, J=7.9, 7.3 Hz, 1H), 4.77 (dd, J=8.5, 4.4 Hz, 1H), 4.50 (dd, J=13.2, 8.5 Hz, 1H), 3.86 (dd, J=13.2, 4.4 Hz, 1H).

Preparation H: methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethyl ester H.i. tert-butyl-dimethyl-[(R)-2-oxiranyl-ethoxy]-silane and (2S)-4-(tert-butyl-dimethyl-silanyloxy)-butane-1,2-diol

The title intermediates were prepared in analogy to Kishi et al., Org. Lett. (2005), 7, 3997, (intermediate S2-3) via hydrolytic kinetic resolution of (RS)-tert-butyl-dimethyl-(2-oxiranyl-ethoxy)-silane (prepared according to J. Org. Chem. (2008), 73, 1093). Two compounds were isolated after CC (Hept/EA 2:1).

First eluting compound: tert-butyl-dimethyl-[(R)-2-oxiranyl-ethoxy]-silane (colourless oil, 25.3 g, 48% yield). ¹H NMR (CDCl₃) δ: 3.77 (t, J=6.4 Hz, 2H), 3.04 (m, 1H), 2.78 (m, 1H), 2.51 (dd, J=5.0, 2.9 Hz, 1H), 1.74 (m, 2H), 0.90 (d, J=0.6 Hz, 9H), 0.06 (s, 6H).

Second eluting compound: (2S)-4-(tert-butyl-dimethyl-silanyloxy)-butane-1,2-diol (colourless oil, 24.9 g, 43% yield). ¹H NMR (CDCl₃) δ: 3.89 (m, 3H), 3.62 (s, 1H), 3.53 (m, 1H), 3.42 (br. s, 1H), 2.29 (m, 1H), 1.70 (m, 2H), 0.90 (s, 9H), 0.09 (s, 6H).

H.ii. Toluene-4-sulfonic acid (S)-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-butyl ester

To a solution of (2S)-4-(tert-butyl-dimethyl-silanyloxy)-butane-1,2-diol (23.9 g, 108 mmol, second eluting compound in H.i and DMAP (2.65 g, 0.2 eq.) in DCM (80 mL) cooled to 0° C. were added TEA (43.8 mL, 2.9 eq.) and a solution of pTsCl (20.7 g, 1.1 eq.) in DCM (15 mL). The mixture was stirred at rt for 5 h, poured into sat. aq. NaHCO₃ and extracted with DCM. The org. layer was dried over MgSO₄ and concentrated. The residue was purified by CC (Hept/EA 2:1) to afford the title intermediate as a colourless oil (31.3 g, 77% yield).

¹H NMR (CDCl₃) δ: 7.80 (d, J=7.6 Hz, 2H), 7.34 (d, J=7.6 Hz, 2H), 4.02 (m, 3H), 3.80 (m, 2H), 2.45 (s, 3H), 1.70 (m, 2H), 1.27 (m, 1H), 0.87 (s, 9H), 0.05 (s, 6H).

H.iii. (2S)-tert-butyl-dimethyl-(2-oxiranyl-ethoxy)-silane

2M NaOH (35 mL) was added to a solution of intermediate H.ii (31.1 g, 83.1 mmol) in THF (350 mL) and the resulting mixture was vigorously stirred at rt for 3 h. The mixture was taken in 1M NaOH (200 mL) and extracted with TBME (2×). The combined org. layers were washed with water and brine, dried over MgSO₄ and concentrated. The resulting oil was purified by Kugelrohr-distillation (ca. 70° C. at 0.1 mbar) to afford the title intermediate as a colourless oil (14.7 g, 87% yield).

¹H NMR (CDCl₃) δ: 3.77 (t, J=6.4 Hz, 2H), 3.04 (m, 1H), 2.78 (m, 1H), 2.51 (dd, J=5.0, 2.9 Hz, 1H), 1.74 (m, 2H), 0.90 (d, J=0.6 Hz, 9H), 0.06 (s, 6H).

H.iv. 6-[(S)-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-butylamino]-4H-benzo[1,4]oxazin-3-one

A solution of 6-amino-4H-benzo[1,4]oxazin-3-one (5.03 g, 30.6 mmol; commercial) and intermediate H.iii (6.2 g, 1 eq.) in EtOH/H₂O (9:1; 180 mL) was heated at 80° C. for 2 days. The mixture was concentrated under reduced pressure. Residual starting aniline could be removed by addition of Et₂O/MeOH followed by filtration. The filtrate containing the product was concentrated under reduced pressure to afford the title intermediate as a brown oil (9.45 g, 84% yield) which was used as such in the next step.

MS (ESI, m/z): 367.2 [M+H⁺].

H.v. 6-{(S)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]oxazin-3-one

Starting from intermediate H.iv (9.4 g, 25.6 mmol), and using procedure I, the title intermediate was obtained as a beige solid (2.40 g, 24% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 393.4 [M+H⁺].

H.vi. 6-[(S)-5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]oxazin-3-one

Starting from intermediate H.v (2.40 g, 6.11 mmol) and using procedure J, the title intermediate was obtained as an off-white solid (0.82 g, 48% yield) after trituration with Et₂O/EA.

MS (ESI, m/z): 279.5 [M+H⁺].

H.vii. Methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate H.vi (0.82 g, 2.95 mmol) and using procedure H, the title compound was obtained as a beige solid (0.61 g, 58% yield).

¹H NMR (DMSO-d6) δ: 10.72 (s, 1H), 7.30 (d, J=2.1 Hz, 1H), 6.93 (m, 2H), 4.76 (m, 1H), 4.52 (s, 2H), 4.34 (m, 2H), 4.11 (t, J=8.8 Hz, 1H), 3.72 (m, 1H), 3.20 (s, 3H), 2.17 (m, 2H).

MS (ESI, m/z): 357.3 [M+H⁺].

Preparation I: methanesulfonic acid 2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethyl ester I.i. 6-[(R)-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-butylamino]-4H-benzo[1,4]oxazin-3-one

A solution of 6-amino-4H-benzo[1,4]oxazin-3-one (commercial; 6.49 g, 39.5 mmol) and tert-butyl-dimethyl-[(R)-2-oxiranyl-ethoxy]-silane (first eluting compound in step H.i; 8.0 g, 39.5 mmol) in EtOH/H₂O (9:1; 240 mL) was heated at 80° C. for 2 days. The mixture was concentrated under reduced pressure. Residual starting aniline could be removed by addition of Et₂O/MeOH followed by filtration. The filtrate containing the product was concentrated under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4) to afford the title intermediate as a brown oil (5.82 g, 40% yield).

MS (ESI, m/z): 367.3 [M+H⁺].

I.ii. 6-{(R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]oxazin-3-one

Starting from intermediate I.i (5.8 g, 15.8 mmol) and using procedure I, the title intermediate was obtained as a beige solid (2.7 g, 43% yield) after trituration with Et₂O/EA/MeOH.

MS (ESI, m/z): 393.5 [M+H⁺].

I.iii. 6-[(R)-5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]oxazin-3-one

Starting from intermediate I.ii (2.70 g, 6.88 mmol) and using procedure J, the title intermediate was obtained as an off-white solid (1.25 g, 65% yield) after trituration with Et₂O/MeOH.

MS (ESI, m/z): 279.5 [M+H⁺].

I.iv. Methanesulfonic acid 2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate I.iii (2.1 g, 7.55 mmol) and using procedure H, the title compound was obtained as an off-white solid (1.16 g, 43% yield).

MS (ESI, m/z): 357.2 [M+H⁺].

Preparation J: methanesulfonic acid 2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester J.i. 6-[(R)-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-butylamino]-4H-benzo[1,4]thiazin-3-one

A solution of 6-amino-4H-benzo[1,4]thiazin-3-one (10.68 g, 59.3 mmol; commercial) and tert-butyl-dimethyl-[(R)-2-oxiranyl-ethoxy]-silane (first eluting compound in step H.i.; 12.0 g, 59.3 mmol) in EtOH/H₂O (9:1; 320 mL) was heated at 80° C. for 2 days. The mixture was concentrated under reduced pressure. Residual starting aniline could be removed by addition of Et₂O/MeOH followed by filtration. The filtrate containing the product was concentrated under reduced pressure to afford the title intermediate as a brown oil (18.8 g, 83% yield) which was used as such in the next step.

MS (ESI, m/z): 383.2 [M+H⁺].

J.ii. 6-{(R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]thiazin-3-one

Starting from intermediate J.i (23.5 g, 49.1 mmol) and using procedure I, the title intermediate was obtained as a colourless solid (8.4 g, 42% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 409.3 [M+H⁺].

6-[(R)-5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate J.ii (8.4 g, 20.6 mmol) and using procedure J, the title intermediate was obtained as an off-white solid (4.79 g, 79% yield) after trituration with Et₂O/EA.

MS (ESI, m/z): 295.5 [M+H⁺].

J.iv. Methanesulfonic acid 2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate J.iii (4.7 g, 16.0 mmol) and using procedure H, the title compound was obtained as an off-white solid (5.80 g, 98% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 373.4 [M+H⁺].

Preparation K: 6-[(S)-5-(2-iodo-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one K.i. 6-[(S)-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-butylamino]-4H-benzo[1,4]thiazin-3-one

A solution of 6-amino-4H-benzo[1,4]thiazin-3-one (8.0 g, 44.5 mmol; commercial) and intermediate H.iii (9.0 g, 1 eq.) in 9-1 EtOH/H₂O (250 mL) was heated at 80° C. for 2 days. The mixture was concentrated under reduced pressure. Residual starting aniline could be removed by addition of Et₂O/MeOH followed by filtration. The filtrate containing the product was concentrated under reduced pressure to afford the title intermediate as a brown oil (14.58 g, 86% yield) which was used as such in the next step.

MS (ESI, m/z): 383.2 [M+H⁺].

K.ii. 6-{(S)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]thiazin-3-one

Starting from intermediate K.i (14.5 g, 37.9 mmol) and using procedure I, the title intermediate was obtained as a colourless solid (5.56 g, 36% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 409.3 [M+H⁺].

K.iii. 6-[(S)-5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate K.ii (5.50 g, 13.6 mmol) and using procedure J, the title intermediate was obtained as an off-white solid (3.08 g, 77% yield) after trituration with Et₂O/EA.

MS (ESI, m/z): 295.5 [M+H⁺].

K.iv. Methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate K.iii (3.0 g, 10.2 mmol) and using procedure H, the title intermediate was obtained as an off-white solid (3.64 g, 96% yield) after trituration with ether.

MS (ESI, m/z): 373.4 [M+H⁺].

K.v. 6-[(S)-5-(2-iodo-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate K.iv (2.5 g, 6.7 mmol) and using procedure K, the title compound was obtained as a slightly orange solid (2.11 g, 78% yield) after trituration with Et₂O/EA.

¹H NMR (DMSO-d6) δ: 10.55 (s, 1H), 7.30 (m, 2H), 7.04 (dd, J=8.5, 2.3 Hz, 1H), 4.68 (m, 1H), 4.10 (t, J=8.8 Hz, 1H), 3.70 (dd, J=8.8, 6.7 Hz, 1H), 3.41 (s, 2H), 3.29 (m, 2H), 2.23 (m, 2H).

MS (ESI, m/z): 405.1 [M+H⁺].

Preparation L: 6-[(R)-5-(2-iodo-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate J.iv (3.5 g, 9.4 mmol) and using procedure K, the title compound was obtained as an off-white solid (3.52 g, 93% yield) after trituration with Et₂O/EA.

¹H NMR (DMSO-d6) δ: 10.55 (s, 1H), 7.30 (m, 2H), 7.04 (dd, J=8.5, 2.3 Hz, 1H), 4.68 (m, 1H), 4.10 (t, J=8.8 Hz, 1H), 3.70 (dd, J=8.8, 6.7 Hz, 1H), 3.41 (s, 2H), 3.29 (m, 2H), 2.23 (m, 2H).

MS (ESI, m/z): 405.0 [M+H⁺].

Preparation M: (RS)-methanesulfonic acid 2-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester M.i. (RS)-6-[4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-butylamino]-4H-benzo[1,4]thiazin-3-one

A solution of 6-amino-4H-benzo[1,4]thiazin-3-one (3.56 g, 19.8 mmol; commercial) and (RS)-tert-butyl-dimethyl-(2-oxiranyl-ethoxy)-silane (prepared according to J. Org. Chem. (2008), 73, 1093; 4.0 g, 19.8 mmol) in EtOH/H₂O (9:1; 140 mL) was heated at 80° C. for 2 days. The mixture was concentrated under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4) to afford the title intermediate as a brown oil (2.20 g, 29% yield).

MS (ESI, m/z): 383.2 [M+H⁺].

M.ii. (RS)-6-{5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]thiazin-3-one

Starting from intermediate M.i (2.20 g, 5.75 mmol) and using procedure I, the title intermediate was obtained as a pale orange solid (1.53 g, 65% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 409.4 [M+H⁺].

M.iii. (RS)-6-[5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate M.ii (1.50 g, 3.67 mmol) and using procedure J, the title intermediate was obtained as an off-white solid (0.73 g, 68% yield) after trituration with Et₂O/EA.

MS (ESI, m/z): 295.1 [M+H⁺].

M.iv. (RS)-methanesulfonic acid 2-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate M.iii (0.70 g, 2.38 mmol) and using procedure H, the title compound was obtained as a beige solid (0.80 g, 90% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 373.1 [M+H⁺].

Preparation N: 6-((S)-5-iodomethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]thiazin-3-one N.i. 6-((S)-3-chloro-2-hydroxy-propylamino)-4H-benzo[1,4]thiazin-3-one

A suspension of 6-amino-4H-benzo[1,4]thiazin-3-one (18.0 g, 100 mmol; commercial) and Ca(OTf)₂ (0.5 eq.) in MeCN (800 mL) was heated at 50° for 1 h. (S)-epichlorohydrin (18.5 g, 200 mmol) was added and the mixture was stirred at rt for 72 h and at 45° C. for 24 h. The volatiles were removed under reduced pressure. After aqueous workup and extraction with EA, the title intermediate crystallised from EA to afford a beige solid (17.38 g, 64% yield).

MS (ESI, m/z): 273.2 [M+H⁺].

N.ii. 6-((S)-5-chloromethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]thiazin-3-one

Starting from intermediate N.i (39.3 g, 144 mmol.) and using procedure I, the title intermediate was obtained as a beige solid (34.2 g, 79% yield) after CC (EA/Hept 2:1, EA).

MS (ESI, m/z): 299.1 [M+H⁺].

N.iii. 6-((S)-5-iodomethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]thiazin-3-one

Starting from intermediate N.ii (14.0 g, 46.9 mmol) and using procedure K, the title compound was obtained as a pale beige solid (15.0 g, 82% yield).

¹H NMR (DMSO-d6) δ: 10.56 (s, 1H), 7.31 (m, 2H), 7.12 (dd, J=8.5, 2.3 Hz, 1H), 4.71 (m, 1H), 4.14 (t, J=9.1 Hz, 1H), 3.59 (m, 3H), 3.31 (s, 2H).

MS (ESI, m/z): 391.4 [M+H⁺].

Preparation O: 6-((R)-5-iodomethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]thiazin-3-one O.i. 6-((R)-3-chloro-2-hydroxy-propylamino)-4H-benzo[1,4]thiazin-3-one

A solution of 6-amino-4H-benzo[1,4]thiazin-3-one (18.39 g, 102 mmol; commercial) and (R)-epichlorohydrin (8.0 mL, 1 eq.) in EtOH/H₂O (9:1; 450 mL) was heated at 80° C. overnight. The mixture was concentrated under reduced pressure. Residual starting aniline could be removed by addition of Et₂O/EA followed by filtration. The filtrate containing the product was concentrated under reduced pressure to afford the title intermediate as a beige solid (22.52 g, 81% yield) which was used as such in the next step.

MS (ESI, m/z): 273.2 [M+H⁺].

O.ii. 6-((R)-5-chloromethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]thiazin-3-one

Starting from intermediate O.i (22.0 g, 81.0 mmol) and using procedure I, the title intermediate was obtained as a yellow solid (8.79 g, 36% yield) after trituration with DCM/MeOH.

MS (ESI, m/z): 299.1 [M+H⁺].

O.iii. 6-((R)-5-iodomethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]thiazin-3-one

Starting from intermediate O.ii (8.75 g, 29 mmol) and using procedure K, the title compound was obtained as an off-white solid (9.27 g, 81% yield) after trituration with Et₂O/EA.

¹H NMR (DMSO-d6) δ: 10.56 (s, 1H), 7.31 (m, 2H), 7.12 (dd, J=8.5, 2.3 Hz, 1H), 4.71 (m, 1H), 4.14 (t, J=9.1 Hz, 1H), 3.59 (m, 3H), 3.31 (s, 2H).

MS (ESI, m/z): 390.9 [M+H⁺].

Preparation P: (S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-5-iodomethyl-oxazolidin-2-one P.i. (S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-5-hydroxymethyl-oxazolidin-2-one

A solution of (2,3-dihydro-benzo[1,4]dioxin-6-yl)-carbamic acid benzyl ester (13.0 g, 45.6 mmol) in THF (220 mL) was cooled to −78° C. before the dropwise addition of n-BuLi (29.5 mL of a 2.3M solution in Hex, 1.1 eq.). The mixture was stirred at −78° C. for 1 h and then warmed to −15° C. and treated dropwise with (S)-glycidyl butyrate (7.37 g, 1.1 eq.). The mixture was stirred at rt overnight. Cs₂CO₃ (tip of a spatula) was added and the mixture heated at 40° C. until complete conversion. The mixture was diluted with EA and washed with a sat. aq. NH₄Cl and water. The org. layer was dried over MgSO₄ and concentrated. The residue was purified by CC (Hex/EA 2:1, 1:1) to afford the title intermediate as a grey solid (7.04 g, 62% yield).

¹H NMR (DMSO-d6) δ: 7.13 (d, J=2.5 Hz, 1H), 6.96 (dd, J=2.5, 8.9 Hz, 1H), 6.86 (d, J=8.9 Hz, 1H), 5.16 (t, J=5.8 Hz, 1H), 4.70-4.50 (m, 1H), 4.30-4.10 (m, 4H), 4.10-3.90 (m, 1H), 4.80-4.70 (m, 1H), 4.70-4.60 (m, 1H), 4.60-4.50 (m, 1H).

P.ii. Methanesulfonic acid (S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl ester

Starting from intermediate P.i (7.0 g, 27.9 mmol) and using procedure H, the title intermediate was obtained as a colourless solid (9.0 g, 98% yield).

MS (ESI, m/z): 330.3 [M+H⁺].

P.iii. (S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-5-iodomethyl-oxazolidin-2-one

Starting from intermediate P.ii (9.0 g, 27.3 mmol) and using procedure K, the title compound was obtained as an off-white solid (6.91 g, 70% yield) after trituration with Et₂O/EA.

¹H NMR (CDCl₃) δ: 7.07 (d, J=2.6 Hz, 1H), 6.98 (dd, J=9.1, 2.6 Hz, 1H), 6.85 (d, J=8.9 Hz, 1H), 4.68 (m, 1H), 4.24 (s, 4H), 4.10 (t, J=9.1 Hz, 1H), 3.72 (dd, J=9.1, 5.9 Hz, 1H), 3.46 (m, 1H), 3.33 (m, 1H).

MS (ESI, m/z): 362.2 [M+H⁺].

Preparation Q: methanesulfonic acid (S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl ester Q.i. 6-[(S)-3-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-propylamino]-4H-benzo[1,4]oxazin-3-one

LiClO₄ (7.20 g, 3 eq.) was added to a solution of tert-butyl-dimethyl-((S)-1-oxiranylmethoxy)-silane (commercial; 4.25 g, 22.6 mmol) in MeCN (70 mL). 6-amino-4H-benzo[1,4]oxazin-3-one (commercial; 3.70 g, 1 eq.) was then added and the mixture was stirred at 50° C. for 6 h. The solvent was removed under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 1000/25/2) to afford the title intermediate as a pale brown foam (5.25 g, 66% yield).

MS (ESI, m/z): 353.3 [M+H⁺].

Q.ii. 6-[(S)-5-(tert-butyl-dimethyl-silanyloxymethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]oxazin-3-one

Starting from intermediate Q.i (10.24 g, 29 mmol) and using procedure I, the title intermediate was obtained as a pale yellow solid (6.30 g, 57% yield) after trituration with ether.

MS (ESI, m/z): 379.2 [M+H⁺].

Q.iii. 6-((S)-5-hydroxymethyl-2-oxo-oxazolidin-3-yl)-4H-benzo[1,4]oxazin-3-one

Starting from intermediate Q.ii (6.30 g, 16.6 mmol) and using procedure J, the title intermediate was obtained as a colourless solid (3.49 g, 79% yield) after trituration with EA.

MS (ESI, m/z): 265.5 [M+H⁺].

Q.iv. Methanesulfonic acid (S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl ester

A suspension of intermediate Q.iii (4.93 g, 18.7 mmol) in anhydrous DCM (110 mL) was treated with DIPEA (12.0 mL, 3.75 eq.) and the mixture was cooled to 0° C. Ms₂O (4.88 g, 1.5 eq.) was added portionwise. The resulting mixture was stirred at 0° C. for 15 min. Water was added and stirring was continued for 15 min at rt. The precipitated product was filtered, washed with water and DCM. The thus obtained solid was triturated with DCM/MeOH/NH₄OH (1000:25:2) to give the title intermediate as a colourless solid (3.785 g, 60% yield).

¹H NMR (DMSO-d6) δ: 10.72 (s, 1H), 7.29 (dd, J=2.1, 0.6 Hz, 1H), 6.94 (m, 2H), 4.95 (m, 1H), 4.52 (s, 2H), 4.49 (m, 2H), 4.11 (t, J=9.1 Hz, 1H), 3.73 (m, 2H), 3.23 (s, 3H).

MS (ESI, m/z): 343.3 [M+H⁺].

Preparation R: (S)-3-(3-fluoro-4-methyl-phenyl)-5-iodomethyl-oxazolidin-2-one R.i. (S)-3-(3-fluoro-4-methyl-phenyl)-5-hydroxymethyl-oxazolidin-2-one

A mixture of 3-fluoro-4-methyl-aniline (commercial; 1.25 g, 10 mmol), sat. aq. NaHCO₃ (10 mL) and acetone (10 mL) was treated dropwise with benzyl chloroformate (1.70 g, 1.41 mL, 1 eq.). After CO₂ evolution ceased, the mixture was partitioned between EA and sat. aq. NaHCO₃, the org. layer was dried over MgSO₄ and concentrated under reduced pressure. The resulting benzyl carbamate was dissolved in THF (50 mL) and cooled under argon to −78° C. n-BuLi (2.5M in Hex, 6.45 mL, 1.1 eq.) was added dropwise, and the resulting solution was stirred for 1 h at that temperature. The reaction was then allowed to warm to −15° C. at which (S)-glycidyl butyrate (1.69 mL, 1.1 eq.) was added dropwise. The mixture was stirred at rt overnight. A tip of a spatula of Cs₂CO₃ was added, and the mixture was stirred at rt for 3 h. NH₄Cl and EA were added and the phases were separated. The aq. phase was extracted once more with EA and the combined org. extracts were washed several times with sat. aq. NH₄Cl, then with brine, dried over Na₂SO₄ and concentrated. The orange solid obtained was triturated with EA to afford the title intermediate as a pale yellow solid (1.18 g, 53% yield).

MS (ESI, m/z): 226.3 [M+H⁺].

R.ii. Methanesulfonic acid (S)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl ester

Starting from intermediate R.i (4.70 g, 20.9 mmol) and following procedure H the title intermediate was obtained as a yellow solid (6.37 g, 100% yield) after trituration in ether.

¹H NMR (CDCl₃) δ: 7.36 (dd, J=11.7, 2.3 Hz, 1H), 7.13 (m, 2H), 4.91 (m, 1H), 4.46 (m, 2H), 4.13 (t, J=9.1 Hz, 1H), 3.92 (dd, J=9.1, 6.2 Hz, 1H), 3.10 (s, 3H), 2.25 (d, J=1.8 Hz, 3H).

MS (ESI, m/z): 330.3 [M+H⁺].

R.iii. (S)-3-(3-fluoro-4-methyl-phenyl)-5-iodomethyl-oxazolidin-2-one

Starting from intermediate R.ii (6.30 g, 20.8 mmol) and using procedure K, the title compound was obtained as a slightly pink solid (6.3 g, 91% yield) after trituration with Et₂O/EA.

¹H NMR (CDCl₃) δ: 7.36 (dd, J=12.0, 2.1 Hz, 1H), 7.16 (m, 2H), 4.73 (m, 1H), 4.14 (m, 1H), 3.76 (dd, J=9.4, 6.2 Hz, 1H), 3.48 (m, 1H), 3.35 (dd, J=10.3, 8.2 Hz, 1H), 2.25 (d, J=1.8 Hz, 3H).

MS (ESI, m/z): 335.8 [M+H⁺].

Preparation S: (RS)-methanesulfonic acid 2-[3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethyl ester S.i. (RS)-4-(tert-butyl-dimethyl-silanyloxy)-1-(3-fluoro-4-methyl-phenylamino)-butan-2-ol

To a solution of (RS)-tert-butyl-dimethyl-(2-oxiranyl-ethoxy)-silane (4.4 g, 200 mmol; prepared as in J. Org. Chem. (2008), 73, 1093) in MeCN (60 mL) was added LiClO₄ (6.31 g, 3 eq.). 3-fluoro-4-methylaniline (commercial; 2.28 g, 0.92 eq.) was added and the mixture was stirred at 50° C. for 5 h. The solvent was removed under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:25:2) to afford the title intermediate as a brown oil (5.56 g, 86% yield).

MS (ESI, m/z): 328.4 [M+H⁺].

S.ii. (RS)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-(3-fluoro-4-methyl-phenyl)-oxazolidin-2-one

Starting from intermediate S.i (2.50 g, 7.63 mmol) and using procedure I, the title intermediate was obtained as an off-white solid (1.22 g, 45% yield) after trituration with ether/EA.

MS (ESI, m/z): 354.2 [M+H⁺].

S.iii. (RS)-3-(3-fluoro-4-methyl-phenyl)-5-(2-hydroxy-ethyl)-oxazolidin-2-one

Starting from intermediate S.ii (1.20 g, 3.40 mmol) and using procedure J, the title intermediate was obtained as a colourless solid (0.478 g, 59% yield) after trituration with Et₂O/EA/DCM.

MS (ESI, m/z): 240.1 [M+H⁺].

S.iv. (RS)-methanesulfonic acid 2-[3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethyl ester

Starting from intermediate S.iii (470 mg, 2.0 mmol) and using procedure H, the title compound was obtained as an off-white solid (0.60 g, 96% yield) after CC (DCM/MeOH/NH₄OH 1000:50:4).

MS (ESI, m/z): 318.2 [M+H⁺].

Preparation T: 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propionaldehyde T.i. 6-[(R)-5-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-pentylamino]-4H-benzo[1,4]oxazin-3-one

A mixture of (R)-tert-butyl-dimethyl-(3-oxiranyl-propoxy)-silane (13 g, 60 mmol; prepared according to Org. Lett. (2005), 7, 3997) and 6-amino-4H-benzo[1,4]oxazin-3-one (9.9 g) in EtOH/H₂O (9:1, 325 mL) was heated at reflux overnight. The volatiles were removed under reduced pressure and the residue purified by CC (Hept/EA 1:1) to give the desired intermediate as a brown oil (8.9 g, 39% yield).

MS (ESI, m/z): 318.2 [M+H⁺].

T.ii. 6-{(R)-5-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]oxazin-3-one

Starting from intermediate T.i (8.8 g, 23 mmol) and using procedure I, the title intermediate was obtained as an orange solid (9.8 g, quant.) after crystallisation from Hept/EA.

MS (ESI, m/z): 407.6 [M+H⁺].

T.iii. 6-[(R)-5-(3-hydroxy-propyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate T.ii (9.8 g, 24 mmol) and using procedure J, the title intermediate was obtained as a yellowish solid (5.0 g, 71% yield) after CC (EA, EA/MeOH 9:1) followed by crystallisation from ether/EA.

MS (ESI, m/z): 293.3 [M+H⁺].

T.iv. 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

To a solution of intermediate T.iii (292 mg, 1 mmol) and DIPEA (0.5 mL, 3 eq.) in DCM (5 mL) at rt was added dropwise a solution of SO₃.pyridine complex (318 mg, 2 eq.) in DMSO (1 mL) over 10 min. The mixture was stirred at rt for 2 h, diluted with DCM and washed with water. The org. phase was washed several times with water, dried over MgSO₄ and concentrated to give the desired aldehyde as a beige solid (260 mg, 90% yield).

¹H NMR (DMSO-d6) δ: 10.71 (s, 1H) 9.68 (d, J=0.9 Hz, 1H), 7.31 (s, 1H), 6.92 (m, 2H), 4.64 (m, 1H), 4.52 (d, J=1.2 Hz, 2H), 4.07 (m, 1H), 3.66 (m, 1H), 2.60 (m, 2H), 1.98 (m, 2H).

Preparation U: 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionaldehyde U.i. 6-[(R)-5-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-pentylamino]-4H-benzo[1,4]thiazin-3-one

A mixture of (R)-tert-butyl-dimethyl-(3-oxiranyl-propoxy)-silane (13 g, 60 mmol; prepared as in Org. Lett. (2005), 7, 3997) and 6-amino-4H-benzo[1,4]thiazin-3-one (10.8 g) in EtOH/H₂O (9:1, 325 mL) was heated at reflux overnight. The volatiles were removed under reduced pressure and the residue purified by CC (Hept/EA 1:1) to give the desired intermediate as a brown oil (6.8 g, 28% yield).

MS (ESI, m/z): 397.1 [M+H⁺].

U.ii. 6-{(R)-5-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]thiazin-3-one

Starting from intermediate U.i (6.7 g, 17 mmol) and using procedure I, the title intermediate was obtained as an orange solid (7.8 g, quant.) after crystallisation from Hept/EA.

MS (ESI, m/z): 423.4 [M+H⁺].

U.iii. 6-[(R)-5-(3-hydroxy-propyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate U.ii (7.1 g, 16.8 mmol) and using procedure J, the title intermediate was obtained as a yellowish solid (3.1 g, 60% yield) after CC (EA. EA/MeOH 9:1).

MS (ESI, m/z): 309.1 [M+H⁺].

U.iv. 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

To a solution of intermediate U.iii (500 mg, 1.6 mmol) and DIPEA (0.83 mL, 3 eq.) in DCM (7 mL) at rt was added dropwise a solution of SO₃.pyridine complex (516 mg, 2 eq.) in DMSO (1.7 mL) over 10 min. The mixture was stirred at rt for 2 h, diluted with DCM and washed with water. The org. phase was washed several times with water, dried over MgSO₄ and concentrated to give the desired aldehyde after trituration with ether/EA as a beige solid (440 mg, 88% yield).

MS (ESI, m/z): 307.5 [M+H⁺].

Preparation V: (R)-4-aminomethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one V.i. 2-(6-methoxy-[1,5]naphthyridin-4-yl)-propane-1,3-diol

A mixture of 2-methoxy-8-methyl-[1,5]naphthyridine (2.90 g, 16.6 mmol; prepared according to WO 00/21948) and formaldehyde (37% in water, 7.8 mL) was heated at 100° C. for 3 days and at 110° C. for 2 days. After cooling to rt, the mixture was concentrated, taken up in MeOH and concentrated again. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8) to afford the title intermediate as a pale beige solid (2.78 g, 71% yield).

¹H NMR (DMSO-d₆) δ: 8.67 (d, J=4.4 Hz, 1H), 8.22 (d, J=9.1 Hz, 1H), 7.51 (d, J=4.4 Hz, 1H), 7.22 (d, J=9.1 Hz, 1H), 4.56 (m, 2H), 4.00 (s, 3H), 3.84 (m, 3H).

V.ii. Acetic acid (S)-3-hydroxy-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl ester

A 0.5M solution of intermediate V.i (5.45 g, 23.3 mmol) in vinyl acetate (60 mL) was treated with powdered 3 Å molecular sieves (350 mg) and stirred at rt for 15 min under a nitrogen atmosphere. Lipase from Candida antarctica (2.69 g, bound to acrylic resin) was added and stirring was continued for 4 h at rt. The mixture was filtered; the filter cake was washed with EA and the filtrate was concentrated. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:25:2) to afford the title intermediate as a colourless oil (2.70 g, 42% yield). The corresponding diacetate (3.81 g, 51% yield) was then afterwards cleaved back to the diol and used again as substrate.

¹H NMR (CDCl₃) δ: 8.72 (d, J=4.4 Hz, 1H), 8.23 (d, J=9.1 Hz, 1H), 7.46 (d, J=4.4 Hz, 1H), 7.14 (d, J=9.1 Hz, 1H), 4.65 (m, 2H), 4.22 (m, 1H), 4.07 (m, 4H), 2.96 (m, 1H), 2.04 (s, 1H).

MS (ESI, m/z): 277.3 [M+H⁺].

Alternative α: V.iii. Acetic acid (S)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester

TEA (2.1 mL, 2 eq.) and MsCl (0.70 mL, 1.2 eq.) were added at 0° C. to a solution of intermediate V.ii (2.05 g, 7.41 mmol) in DCM (40 mL). The reaction was stirred for 20 min at this temperature. DCE (40 mL) was added and the solution was slowly warmed to 60° C. and let stir at this temperature for 4 h. After cooling to rt, water was added and the two layers were decanted and the aq. layer was extracted once more with DCM. The combined org. layers were concentrated to dryness. The residue was triturated with TBME to afford the title intermediate as a grey solid (1.40 g, 77% yield).

¹H NMR (CDCl₃) δ: 8.52 (d, J=4.7 Hz, 1H), 7.93 (d, J=9.7 Hz, 1H), 7.34 (d, J=4.7 Hz, 1H), 6.89 (d, J=9.7 Hz, 1H), 4.56 (dd, J=12.9, 9.4 Hz, 1H), 4.36 (m, 2H), 4.27 (dd, J=13.2, 5.0 Hz, 1H), 4.10 (m, 1H), 2.06 (s, 3H).

MS (ESI, m/z): 245.2 [M+H⁺].

V.iv. (S)-4-hydroxymethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

K₂CO₃ (0.40 g, 0.5 eq.) was added to a solution of intermediate V.iii (1.40 g, 5.73 mmol) cooled to 0° C. and the resulting mixture was vigorously stirred at 0° C. for 30 min. The mixture was concentrated and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8). The product was triturated with EA/TBME to afford the title intermediate as a grey solid (0.98 g, 85% yield).

MS (ESI, m/z): 203.0 [M+H⁺].

V.v. Methanesulfonic acid (S)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester

A solution of intermediate V.iv (0.33 g, 1.63 mmol) and TEA (0.57 mL, 2.5 eq.) in anhydrous DCM (15 mL) was cooled to 0° C. and treated dropwise with MsCl (0.19 mL, 1.5 eq.). The resulting mixture was stirred at 0° C. for 1 h. Water and DCM were added and the phases separated. The org. layer was dried over MgSO₄ and concentrated under reduced pressure to afford the title intermediate as a colourless gum (0.40 g, 88% yield) which was used in the next step without further purification.

MS (ESI, m/z): 281.3 [M+H⁺].

V.vi. (R)-4-aminomethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

A solution of intermediate V.v (0.35 g, 1.24 mmol) in DMF (12 mL) was treated with sodium azide (0.65 g, 8 eq.) and stirred at 50° C. for 1.5 h. After cooling to rt, water was added and the mixture was extracted with DCM. The org. layer was dried over MgSO₄ and concentrated under reduced pressure to give a yellow oil (crude azide) which was taken up in THF (1.5 mL). PPh₃ (390 mg) and water (0.13 mL) were added and the mixture was heated at 50° C. for 3 h. The reaction mixture was concentrated to dryness and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8) to afford the title intermediate as a yellow oil (30 mg, 12% yield).

MS (ESI, m/z): 202.2 [M+H⁺].

Alternative β: V.ii. Acetic acid (R)-3-(tert-butyl-dimethyl-silanyloxy)-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl ester

To a solution of intermediate V.ii (1.66 g) in DCM (50 mL) were added imidazole (1 eq.) and TBDMSCl (1 eq.). The mixture was stirred at rt for 3 h. Another eq. of each reagent was added and the reaction was complete after 15 min. Water was added and the mixture was extracted with DCM. The org. layer was dried over MgSO₄ and concentrated to afford the title intermediate as a colourless oil (2.36 g, 100% yield).

MS (ESI, m/z): 391.5 [M+H⁺].

V.iii. (R)-3-(tert-butyl-dimethyl-silanyloxy)-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propan-1-ol

A suspension of intermediate V.vii (2.36 g) and K₂CO₃ (3.34 g) in MeOH (50 mL) was vigorously stirred at rt for 30 min. Water and DCM were added. The two layers were decanted and the aq. layer was extracted once more with DCM. The combined org. layers were dried over MgSO₄, filtered and concentrated to dryness to afford the title intermediate as a colourless oil (2.1 g, 100% yield).

MS (ESI, m/z): 349.1 [M+H⁺].

V.ix. 8-[(R)-2-azido-1-(tert-butyl-dimethyl-silanyloxymethyl)-ethyl]-2-methoxy-[1,5]naphthyridine

Starting from intermediate V.viii (2.09 g) and following procedure N, the title intermediate was isolated as a colourless oil (1.79 g, 80% yield).

MS (ESI, m/z): 374.1 [M+H⁺].

V.x. [(R)-3-(tert-butyl-dimethyl-silanyloxy)-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl]-carbamic acid tert-butyl ester

Starting from intermediate V.ix (1.79 g) and using procedure F and procedure G, the title intermediate was obtained as a dark oil (2.14 g, 100% yield).

MS (ESI, m/z): 448.2 [M+H⁺].

V.xi. [(R)-3-hydroxy-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl]-carbamic acid tert-butyl ester

Starting from intermediate V.x (2.14 g) and using procedure J, the title intermediate was obtained as a colourless solid (1.14 g, 72% yield).

MS (ESI, m/z): 334.2 [M+H⁺].

V.xii. ((R)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl)-carbamic acid tert-butyl ester

Starting from intermediate V.xi (1.14 g) and using procedure H followed by heating at 60° C. for 2 h in DCE, the title intermediate was obtained as a colourless solid (0.91 g, 88% yield).

MS (ESI, m/z): 302.2 [M+H⁺].

V.xiii. (R)-4-aminomethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate V.xi (0.91 g) and using procedure B, the title intermediate was obtained as a pale yellow solid (0.496 g, 82% yield).

MS (ESI, m/z): 202.1 [M+H⁺].

Preparation W: (RS)-methanesulfonic acid 7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester W.i. 3-(tert-butyl-dimethyl-silanyloxy)-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propan-1-ol

A solution of the intermediate V.i (1.10 g) in THF (55 mL) was treated at 0° C. with imidazole (351 mg) and a solution of TBDMSCl (707 mg) in THF (10 mL). After stirring at rt for 2 days, the reaction mixture was diluted with EA and extracted with water and brine. The org phase was dried over MgSO₄ and purified by CC (Hept/EA 1.1 to 0:1), affording a colourless oil (570 mg; 35% yield).

MS (ESI, m/z): 349.2 [M+H⁺].

W.ii. Methanesulfonic acid 3-(tert-butyl-dimethyl-silanyloxy)-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl ester

Starting from intermediate W.i (1.4 g) and MsCl (0.374 mL) and using procedure H, the title compound was obtained as a yellow oil (1.4 g, 81% yield).

¹H NMR (CDCl₃) δ: 8.72 (d, J=4.4 Hz, 1H) 8.23 (d, J=9.1 Hz, 1H), 7.50 (d, J=4.7 Hz, 1H), 7.15 (d, J=9.1 Hz, 1H), 4.78 (m, 2H), 4.44 (m, 1H), 4.05 (m, 5H), 2.90 (s, 3H), 0.87 (m, 12H), −0.02 (d, J=8.5 Hz, 6H).

W.iii. 4-(tert-butyl-dimethyl-silanyloxymethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

A solution of intermediate W.ii (1.4 g) in DCE (20 mL) was heated at 85° C. overnight. The reaction mixture was evaporated under reduced pressure. The residue was purified by CC (EA to EA/MeOH 9:1), affording a colourless oil (340 mg; 33% yield).

MS (ESI, m/z): 317.1 [M+H⁺].

W.iv. 4-hydroxymethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate W.iii (330 mg) and using procedure J, the title compound was obtained as a colourless solid (90 mg, 43% yield).

MS (ESI, m/z): 203.2 [M+H⁺].

W.v. (RS)-methanesulfonic acid 7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester

Starting from intermediate W.iv (90 mg) and using procedure H, the title compound was obtained as a yellow solid (90 mg, 72% yield).

Analytical data identical to the (S)-enantiomer (intermediate V.v).

Preparation X: rac-1-amino-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one X.i. 2-azido-2-(2-methoxy-quinolin-8-yl)-ethanol

A solution of 2-methoxy-8-(2-oxiranyl)-quinoline (900 mg; prepared according to WO 2006/046552) in dioxane/water (5:1; 60 mL) was reacted with NaN₃ at 90° C. for 5 h. The solvents were removed under reduced pressure and the residue was purified by CC (Hex/EA 2:1 to 1:1), affording a yellow oil (480 mg; 44% yield).

MS (ESI, m/z): 245.0 [M+H⁺].

X.ii. rac-2-amino-2-(2-methoxy-quinolin-8-yl)-ethanol

Starting from intermediate X.i (470 mg) and using procedure F, the title compound was obtained as a yellow oil (450 mg; 100% yield).

MS (ESI, m/z): 219.1 [M+H⁺].

X.iii. rac-[2-hydroxy-1-(2-methoxy-quinolin-8-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate X.ii (430 mg) and using procedure G, the title compound was obtained as a yellow oil (720 mg; quant.)

MS (ESI, m/z): 319.1 [M+H⁺].

X.iv. rac-methanesulfonic acid 2-tert-butoxycarbonylamino-2-(2-methoxy-quinolin-8-yl)-ethyl ester

Starting from intermediate X.iii (700 mg) and using procedure H, the title compound was obtained as a yellow oil (900 mg, quant.).

MS (ESI, m/z): 397.0 [M+H⁺].

X.v. rac-(4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A solution of intermediate X.iv (850 mg) in DCE (10 mL) was heated at 85° C. overnight. The solvent was evaporated under reduced pressure, affording a brown oil (780 mg; quant.) which was used without further purification in the next step.

MS (ESI, m/z): 287.1 [M+H⁺].

X.vi. rac-1-amino-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate X.v (572 mg) and using procedure B, the title compound was obtained as a beige solid (230 mg; 62% yield).

MS (ESI, m/z): 187.0 [M+H⁺].

Preparation Y: (S)-4-amino-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one Y.i. (S)-2-azido-2-(6-methoxy-[1,5]naphthyridin-4-yl)-ethanol

This compound was prepared in analogy to Preparation X, step Xi, but starting from 2-methoxy-8-[(2R)-2-oxiranyl]-1,5-naphthyridine (prepared according to WO 02/08224).

The compound was purified by CC (Hept/EA 1:1 to 2:1 to 0:1), affording a yellow solid (3.9 g (87%; contaminated by its region isomer).

MS (ESI, m/z): 246.3 [M+H⁺].

Y.ii. (S)-2-amino-2-(6-methoxy-[1,5]naphthyridin-4-yl)-ethanol

Starting from intermediate Y.i (3.90 g) and using procedure F, the title compound was obtained as a yellow oil (2.80 g, 80% yield).

MS (ESI, m/z): 220.0 [M+H⁺].

Y. iii. (S)-[2-hydroxy-1-(6-methoxy-[1,5]naphthyridin-4-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate Y.ii (2.90 g) and using procedure G, the title compound was obtained as a colourless foam (1.40 g, 33% yield).

MS (ESI, m/z): 320.1 [M+H⁺].

Y.iv. ((S)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-yl)-carbamic acid tert-butyl ester

Starting from the intermediate Y.iii (1.40 g) and using procedure H followed by heating at 80° C. for 7 h, the title compound was obtained as a beige solid (570 mg, 45% yield).

MS (ESI, m/z): 288.4 [M+H⁺].

Y.v. (S)-4-amino-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate Y.iv (570 mg) and using procedure B, the title compound was obtained as a beige solid (470 mg, quant.).

¹H NMR (CDCl₃) δ: 8.43 (d, J=4.7 Hz, 1H), 7.79 (d, J=9.7 Hz, 1H), 7.43 (dd, J=4.7, 0.9 Hz, 1H), 6.74 (d, J=10.0 Hz, 1H), 4.91 (m, 1H), 4.52 (dd, J=13.2, 8.5 Hz, 1H), 4.02 (dd, J=13.5, 4.7 Hz, 1H).

Preparation Z: (S)-6-amino-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one Z.i. 2-methoxy-8-vinyl-quinoxaline

A suspension of methyltriphenylphosphonium bromide (22.78 g) in THF (200 mL) was treated with tBuOK (7.15 g) and further stirred at rt for 1 h. The mixture was cooled to 0° C. and treated with a solution of 3-methoxy-5-quinoxalinecarboxaldehyde (10.0 g; prepared according to WO 2006/021448) in THF (100 mL). The mixture was further stirred at rt for 3 h, diluted with ether and washed with water and an aq. sat. NH₄Cl solution. The org. phase was dried over MgSO₄ and concentrated under reduced pressure. The residue was crystallized from ether and the crystals were filtered off. The mother liquor was purified by CC (Hex/EA 1:1), affording a light orange solid (8.70 g; 88% yield).

¹H NMR (CDCl₃) δ: 8.48 (s, 1H), 7.92 (m, 2H), 7.78 (dd, J=17.9, 11.1 Hz, 1H), 7.54 (m, 1H), 6.03 (dd, J=17.9, 1.5 Hz, 1H), 5.48 (dd, J=11.4, 1.5 Hz, 1H), 4.12 (s, 3H).

Z.ii. (R)-1-(3-methoxy-quinoxalin-5-yl)-ethane-1,2-diol

Starting from intermediate Z.i (8.70 g) and using procedure L with AD-mix β, the title compound was obtained as a beige solid (7.60 g, 74% yield) after crystallization from ether/EA.

MS (ESI, m/z): 221.1 [M+H⁺].

Z.iii. (R)-2-(tert-butyl-dimethyl-silanyloxy)-1-(3-methoxy-quinoxalin-5-yl)-ethanol

Starting from intermediate Z.ii (7.60 g) and using procedure M, the title compound was obtained as a yellow oil (8.80 g, 76% yield).

MS (ESI, m/z): 335.0 [M+H⁺].

Z.iv. (S)-2-amino-2-(3-methoxy-quinoxalin-5-yl)-ethanol

Starting from intermediate Z.iii (8.80 g) and using procedure N, the desired azide (20 g) was obtained, which was used without further purification in the next reaction. A solution of this azide (20 g, contaminated with PPh₃O) in THF (228 mL) was then treated with PPh₃ (7.50 g) and water (4.68 mL). The reaction mixture was further stirred at 50° C. for 2 days, and then extracted with 3M HCl. The aq. phase was basified with. aq. NaOH solution and extracted with EA. The org layer was dried over MgSO₄ and evaporated under reduced pressure, affording a yellow oil (6.10 g; title compound contaminated with traces of PPh₃O).

MS (ESI, m/z): 220.0 [M+H⁺].

Z.v. [(S)-2-hydroxy-1-(3-methoxy-quinoxalin-5-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate Z.iv (6.00 g) and using procedure G, the title compound was obtained as a yellowish foam (5.90 g, 67% yield).

MS (ESI, m/z): 320.1 [M+H⁺].

Z.vi. ((S)-3-oxo-5,6-dihydro-3H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-carbamic acid tert-butyl ester

A solution of intermediate Z.v (5.80 g) and TEA (3.0 mL) in DCE (45 mL) was treated dropwise at 0° C. with MsCl (1.55 mL). The reaction mixture was further refluxed overnight. The reaction mixture was diluted with DCM, washed with water and brine, dried over MgSO₄ and evaporated under reduced pressure affording, after crystallization from ether/EA, a beige solid (3.50 g; 67% yield) consisting of an inseparable 2:1 mixture of the desired product and 4-(3-methoxy-quinoxalin-5-yl)-oxazolidin-2-one which was used as such in the next step.

MS (ESI, m/z): 288.0 and 246.0 [M+H⁺].

Z.vii. (S)-6-amino-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from intermediate Z.vi (3.50 g) and using procedure B, the title compound was obtained as a beige solid (780 mg, 34% yield). The side product from cyclisation was removed by acid/base extraction.

MS (ESI, m/z): 188.1 [M+H⁺].

Preparation AA: (R)-6-amino-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

The title compound was prepared in analogy to Preparation Z, using AD-mix α in the second step.

The analytical data are identical to those of the compound of Preparation Z.

Preparation AB: rac-methanesulfonic acid 4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-ylmethyl ester AB.i. 2-(2-methoxy-quinolin-8-yl)-malonic acid dimethyl ester

A mixture of 8-bromo-2-methoxy-quinoline (4.76 g; prepared according to WO 2008/125594) and dimethylmalonate (36 mL) in was degassed by bubbling N₂ through for 10 min and treated with CuBr (3.47 g) and NaOMe (2.6 g). The mixture was heated at 100° C. for 20 h and then partitioned between EA and water. The org. phase was washed with brine, dried over MgSO₄ and the excess dimethylmalonate was removed by distillation. The residue was purified by CC (Hept/EA 4:1, 2:1), affording an oil (2.80 g; 48% yield).

¹H NMR (CDCl₃) δ: 7.98 (d, J=8.8 Hz, 1H), 7.71 (dd, J=8.2, 1.5 Hz, 1H), 7.66 (m, 1H), 7.39 (m, 1H), 6.92 (d, J=8.8 Hz, 1H), 6.00 (s, 1H), 4.03 (s, 3H), 3.76 (s, 3H).

AB.ii. 2-(2-methoxy-quinolin-8-yl)-propane-1,3-diol

Starting from intermediate AB.i (5.80 g) and using procedure A, the title compound was obtained as a light yellow oil (1.06 g, 23% yield).

MS (ESI, m/z): 234.2 [M+H⁺].

AB.iii. rac-methanesulfonic acid 4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-ylmethyl ester

Starting from intermediate AB.ii (840 mg) and using procedure H, but using 3 eq. of methansulfonyl anhydride instead of MSCl and 4 eq. of Pyr as a base, the intermediate dimesylate was further stirred at 70° C. for 1 h. The reaction mixture was diluted with 2N HCl and extracted with DCM. The org. phase was dried over MgSO₄ and evaporated under reduced pressure affording, after purification by CC (EE/MeOH 9:1), a beige foam (1.10 g; 76% yield).

MS (ESI, m/z): 280.4 [M+H⁺].

Preparation AC: rac-6-aminomethyl-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one AC.i. (3-methoxy-quinoxalin-5-yl)-acetic acid methyl ester

TBDMSCl (2.4 mL) was added dropwise to a solution of 3-methoxy-5-quinoxalineacetonitrile (1.08 g, prepared according to WO 2008/126024) in dry MeOH (20 mL). The solution was stirred at reflux overnight. TBDMSCl (2.4 mL) was added and the reaction mixture was further stirred for 8 h. TBDMSCl (2.4 mL) was added and the reaction mixture was further stirred at reflux overnight. The mixture was concentrated under reduced pressure and partitioned between EA and water. The org. layer was washed with 2M NaOH, water and brine, dried over MgSO₄, concentrated under reduced pressure and purified by CC (Hept/EtOAc 1:1), affording a yellow oil (520 mg; 41% yield).

MS (ESI, m/z): 233.3 [M+H⁺].

AC.ii. rac-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-2-(3-methoxy-quinoxalin-5-yl)-propionic acid methyl ester

A solution of intermediate AC.i (2.03 g) in THF (19 mL) was added dropwise at −78° C. to a solution of LiHMDS (1M in THF; 10.5 mL) in THF (10 mL). The solution was further stirred at −78° C. stirred for 1 h and treated dropwise with a solution of N-(bromomethyl)phthalimide (2.6 g) in THF (19 mL). The reaction mixture was further stirred at −78° C. for 1 h and at rt overnight. The solution was quenched with 1N HCl (30 mL) and extracted with EA. The org. layer was washed with water and brine, dried over MgSO₄, concentrated under reduced pressure and purified by CC (Hept/EA 1:1), affording, after crystallization from EA, a beige solid (2.28 g; 66% yield).

MS (ESI, m/z): 392.3 [M+H⁺].

AC.iii. rac-3-amino-2-(3-methoxy-quinoxalin-5-yl)-propionic acid methyl ester

Hydrazine monohydrate (1.42 mL) was added dropwise at rt to a suspension of intermediate AC.ii (2.28 g) in EtOH (38 mL). After stirring at rt for 2 h the solvent was evaporated under reduced pressure and the residue was taken up in EA and aq. citric acid (10%). The aq. layer was washed with NH₄OH and extracted with DCM. The org. layer was dried over MgSO₄ and evaporated under reduced pressure affording a yellow oil (1.16 g; 77% yield) which was further used without any further purification.

MS (ESI, m/z): 262.3 [M+H⁺].

AC.iv. rac-3-tert-butoxycarbonylamino-2-(3-methoxy-quinoxalin-5-yl)-propionic acid methyl ester

Starting from intermediate AC.iii (1.16 g) and using procedure G, the title compound was obtained as a colourless solid (1.34 g, 83% yield).

MS (ESI, m/z): 362.0 [M+H⁺].

AC.v. rac-[3-hydroxy-2-(3-methoxy-1,2-dihydro-quinoxalin-5-yl)-propyl]-carbamic acid tert-butyl ester

Starting from intermediate AC.iv (701 mg) and using procedure A, the compound was obtained as a colourless foam (554 mg, 85% yield).

MS (ESI, m/z): 336.2 [M+H⁺].

AC.vi. rac-[3-hydroxy-2-(3-methoxy-quinoxalin-5-yl)-propyl]-carbamic acid tert-butyl ester

A solution of intermediate AC.v (553 mg) in DCM (30 mL) was treated with MnO₂ (1.35 g). The mixture was stirred at rt for 2 h, filtered and concentrated in vacuo to give the desired intermediate as a slightly orange foam (489 mg, 89% yield).

MS (ESI, m/z): 334.1 [M+H⁺].

AC.vii. rac-(3-oxo-5,6-dihydro-3H-pyrrolo[1,2,3-de]quinoxalin-6-ylmethyl)-carbamic acid tert-butyl ester

Starting from intermediate AC.vi (486 mg) and using procedure H, the title compound was obtained as a beige solid (393 mg, 89% yield).

MS (ESI, m/z): 302.1 [M+H⁺].

AC.viii. rac-6-aminomethyl-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from intermediate AC.viii (388 mg) and using procedure B, the title compound was obtained as a yellow solid (172 mg, 66% yield).

MS (ESI, m/z): 202.3 [M+H⁺].

Preparation AD: (S)-6-amino-7-fluoro-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one AD.i. (R)-1-(6-fluoro-3-methoxy-quinoxalin-5-yl)-ethane-1,2-diol

Starting from 7-fluoro-2-methoxy-8-(2-propen-1-yl)-quinoxaline (3.24 g; prepared according to WO 2008/003690) and using procedure L with AD-mix β, the title compound was obtained, after purification by CC (Hept/EA 1:1 then 0:1), as a beige solid (3.39 g, 90% yield).

¹H NMR (DMSO d6) δ: 8.57 (s, 1H), 7.96 (dd, J=9.1, 5.6 Hz, 1H), 7.48 (dd, J=10.3, 9.1 Hz, 1H), 5.64 (d, J=6.7 Hz, 1H), 5.26 (d, J=6.4 Hz, 1H), 4.75 (m, 1H), 4.05 (s, 3H), 3.88 (m, 1H), 3.73 (m, 1H).

AD.ii. (R)-2-(tert-butyl-dimethyl-silanyloxy)-1-(6-fluoro-3-methoxy-quinoxalin-5-yl)-ethanol

Starting from intermediate AD.i (3.39 g) and using procedure M, the title compound was obtained as a colourless oil (4.83 g, 96% yield).

¹H NMR (CDCl₃) δ: 8.47 (s, 1H), 7.95 (m, 1H), 7.35 (m, 1H), 5.5 (m, 1H), 4.09 (s, 3H), 4.03 (m, 2H), 0.76 (s, 9H), −0.12 (d, J=5.0 Hz, 6H).

AD.iii. (S)-[2-(tert-butyl-dimethyl-silanyloxy)-1-(6-fluoro-3-methoxy-quinoxalin-5-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate AD.ii (4.73 g) and using procedure N′, the title compound was obtained, after purification by CC (Hept/EA 4:1), as a colourless foam (3.48 g; 84% yield).

¹H NMR (CDCl₃) δ: 8.45 (s, 1H), 7.93 (dd, J=9.1, 5.6 Hz, 1H), 7.30 (m, 1H), 6.60 (m, 1H), 5.85 (m, 1H), 4.12 (s, 4H), 3.94 (m, 2H), 1.43 (s, 9H), 0.75 (s, 9H), −0.08 (s, 3H), −0.12 (s, 3H).

AD.iv. (S)-[1-(6-fluoro-3-methoxy-quinoxalin-5-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate AD.iii (5.54 g) and using procedure J, the title compound was obtained as a colourless foam (3.48 g, 84% yield).

¹H NMR (CDCl₃) δ: 8.45 (s, 1H), 7.95 (dd, J=9.4, 5.9 Hz, 1H), 7.34 (m, 1H), 6.60 (m, 1H), 5.85 (m, 1H), 4.11 (s, 3H), 3.92 (m, 2H), 1.42 (s, 9H).

AD.v. (S)-(7-fluoro-3-oxo-5,6-dihydro-3H-pyrrolo[1, 2, 3-de]quinoxalin-6-yl)-carbamic acid tert-butyl ester

Starting from intermediate AD.iv (3.45 g) and using procedure H followed by heating at reflux for 12 h, a foam (2.64 g) was obtained which contained the desired product in a 1:1 mixture with (S)-4-(6-fluoro-3-methoxy-quinoxalin-5-yl)-oxazolidin-2-one. It was used as such in the next step.

AD.vi. (S)-6-amino-7-fluoro-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the mixture obtained at step AD.v (2.64 g, purity 50%) and using procedure B followed by acid/base extraction, the title compound was obtained as an orange solid (550 mg, 60% yield).

¹H NMR (DMSO d6) δ: 8.12 (s, 1H), 7.74 (dd, J=8.8, 4.4 Hz, 1H), 7.11 (m, 1H), 4.94 (dd, J=8.5, 3.8 Hz, 1H), 4.50 (dd, J=13.2, 8.5 Hz, 1H), 3.90 (dd, J=13.2, 3.8 Hz, 1H), 2.32 (br., 2H).

Preparation AE: rac-1-aminomethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one AE.i. rac-1-azidomethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

A solution of the compound of Preparation AB (1.00 g) in DMF (16 mL) was heated at 60° C. for 3 h in presence of NaN₃ (2.80 g). The reaction mixture was diluted with water and extracted with EA. The org. layer was washed with water and brine, dried over MgSO₄ and evaporated affording a yellow powder (800 mg; 99% yield).

¹H NMR (CDCl₃) δ: 7.72 (d, J=9.4 Hz, 1H), 7.45 (m, 2H), 7.19 (m, 1H), 6.69 (d, J=9.4 Hz, 1H), 4.55 (dd, J=13.2, 9.4 Hz, 1H), 4.26 (dd, J=13.2, 4.7 Hz, 1H), 3.91 (m, 1H), 3.67 (m, 2H).

AE.ii. rac-1-aminomethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate AE.i (800 mg) and using procedure F, the title compound was obtained as a yellow oil (310 mg, 44% yield).

¹H NMR (CDCl₃) δ: 7.70 (d, J=9.4 Hz, 1H), 7.41 (m, 2H), 7.17 (t, J=7.6 Hz, 1H), 6.67 (d, J=9.4 Hz, 1H), 4.54 (dd, J=13.2, 9.7 Hz, 1H), 4.32 (dd, J=12.6, 4.7 Hz, 1H), 3.80 (m, 1H), 3.10 (d, J=6.2 Hz, 2H).

Preparation AF: 6-[(R)-5-(2-amino-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one AF.i. 6-[(R)-5-(2-azido-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

A solution of the compound of Preparation J (2.5 g) and NaN₃ (523 mg) in DMF (12 mL) was heated at 80° C. overnight. The reaction mixture was diluted with EA and extracted with water and brine. The org. layer was dried over MgSO₄ and evaporated under reduced pressure. The residue was stirred in ether/MeOH, affording a beige solid (1.9 g; 89% yield).

MS (ESI, m/z): 320.2 [M+H⁺].

AF.ii. 6-[(R)-5-(2-amino-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate AF.i (1.8 g) and using procedure F, the title compound was obtained as a colourless solid (1.40 g, 85% yield).

MS (ESI, m/z): 294.4 [M+H⁺].

Preparation AG: methanesulfonic acid (S)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-ylmethyl ester AG.i. (S)-5-hydroxymethyl-3-(4-propyl-phenyl)-oxazolidin-2-one

Starting from 4-propyl-aniline and following the procedure described for the preparation of intermediate R.i., the title compound was obtained as a yellow solid (4.3 g; 63% yield)

MS (ESI, m/z): 235.9 [M+H⁺].

AG.ii. Methanesulfonic acid (S)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-ylmethyl ester

Starting from intermediate AG.i (4.25 g) and using procedure H (with however 1.5 eq. Ms₂O instead of MsCl), the title compound was obtained as an off-white solid (4.30 g, 76% yield).

MS (ESI, m/z): 314.1 [M+H⁺].

Preparation AH: methanesulfonic acid (S)-3-(4-butyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl ester AH.i. (S)-5-hydroxymethyl-3-(4-butyl-butyl)-oxazolidin-2-one

Starting from 4-butyl-aniline and following the procedure described for the preparation of intermediate R.i, the title compound was obtained as a yellow solid (2.99 g; 58% yield).

¹H NMR (CDCl₃) δ: 7.43 (d, J=8.8 Hz, 2H), 7.17 (d, J=8.8 Hz, 2H), 4.73 (m, 1H), 3.99 (m, 3H), 3.76 (m, 1H), 2.58 (m, 2H), 2.00 (br. s, 1H), 1.57 (m, 2H), 1.34 (m, 2H), 0.92 (t, J=7.0 Hz, 3H).

AH.ii. Methanesulfonic acid (S)-3-(4-butyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl ester

Starting from intermediate AH.i (2.90 g) and using procedure H (with however 1.5 eq. of Ms₂O instead of MsCl), the title compound was obtained as an off-white solid (2.48 g, 65% yield).

MS (ESI, m/z): 328.3 [M+H⁺].

Preparation AI: methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

The title compound was prepared in analogy to Preparation J, using however tert-butyl-dimethyl-[(S)-2-oxiranyl-ethoxy]-silane.

The analytical data were identical with those of the compound of Preparation J.

Preparation AJ: methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester AJ.i. (2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-carbamic acid tert-butyl ester

A suspension of 2,3-dihydro-1,4-dioxino[2,3-c]pyridine-7-carboxylic acid (3.20 g; prepared according to WO 2007/016610) in tBuOH (100 mL) was treated with DPPA (4.60 mL) and TEA (3.0 mL) and heated at 80° C. overnight. The solvent was evaporated under reduced pressure and the residue as partitioned between water and EA. The org. layer was washed with brine, dried over MgSO₄ and evaporated under reduced pressure. The residue was stirred in ether, affording a beige solid (2.90 g; 65% yield).

¹H NMR (CDCl₃) δ: 7.84 (s, 1H), 7.49 (s, 1H), 4.31 (m, 2H), 4.23 (m, 2H), 1.52 (s, 11H).

AJ.ii. rac-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-oxazolidin-2-one

A solution of intermediate AJ.i (3.30 g) and 2-[2-[[(tert-butyl)dimethylsilyl]oxy]ethyl]-oxirane (2.65 g; prepared according to J. Org. Chem. (2008), 73(3), 1093-1098) in DMF (42 mL) was cooled to 0° C. and treated with tBuOLi (18 mL; 2.2M in THF). The reaction mixture was allowed to reach rt and further stirred at 80° C. for 2 days. The reaction mixture was diluted with EA and washed with water and brine. The org. layer was dried over MgSO₄ and purified by CC (Hex/EA1:1), affording a yellow oil (2.70 g; 54% yield).

MS (ESI, m/z): 381.0 [M+H⁺].

AJ.iii. rac-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-5-(2-hydroxy-ethyl)-oxazolidin-2-one

Starting from intermediate AJ.ii and using procedure J, the title compound was obtained as a yellow solid (1.10 g, 58% yield).

MS (ESI, m/z): 267.1 [M+H⁺].

AJ.iv. Methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate AJ.iii and using procedure H, the title compound was obtained as a beige solid (1.30 g, 100% yield).

MS (ESI, m/z): 345.2 [M+H⁺].

Preparation AK: rac-methanesulfonic acid 2-[3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethyl ester AK.i. (2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-carbamic acid benzyl ester

A solution of 2,3-dihydro-1,4-dioxino[2,3-b]pyridin-6-amine (commercial; 2.70 g) in acetone/water 1:1 (40 mL) was treated at 0° C. with 1M NaHCO₃ (35 mL) and CbzCl (2.63 mL). The reaction mixture was stirred at rt for 3 h, the org. solvent was evaporated under reduced pressure and the residue was partitioned between water and ether/EA. The org layer was dried over MgSO₄ and evaporated under reduced pressure, affording a beige solid (5.3 g; 100% yield).

¹H NMR (CDCl₃) δ: 7.50 (d, J=8.5 Hz, 1H), 7.36 (m, 5H), 7.20 (d, J=8.8 Hz, 1H), 7.15 (br., 1H), 4.37 (m, 2H), 4.19 (m, 2H).

AK.ii. rac-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-oxazolidin-2-one

Starting from intermediate AK.i and 2-[2-[[(tert-butyl)dimethylsilyl]oxy]ethyl]-oxirane, the compound was prepared in analogy to Preparation AJ, step AJ.ii. The product was purified by CC (Hex/EA 1:1), affording a brown oil (2.90 g; 73% yield).

MS (ESI, m/z): 381.2 [M+H⁺].

AK.iii. rac-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-5-(2-hydroxy-ethyl)-oxazolidin-2-one

Starting from intermediate AK.ii and using procedure J, the title compound was obtained as a yellow solid (1.10 g, 56% yield).

MS (ESI, m/z): 266.8 [M+H⁺].

AK.iv. rac-methanesulfonic acid 2-[3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethyl ester

Starting from intermediate AK.iii and using procedure H, the title compound was obtained as a beige solid (1.24 g, 96% yield).

¹H NMR (CDCl₃) δ: 7.71 (d, J=8.8 Hz, 1H), 7.24 (m, 1H), 4.79 (m, 1H), 4.43 (m, 4H), 4.33 (m, 1H), 4.23 (m, 2H), 3.89 (dd, J=10.3, 6.7 Hz, 1H), 3.04 (s, 3H), 2.20 (m, 2H).

Preparation AL: methanesulfonic acid 2-[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-yl]-ethyl ester AL.i. (R)-4-(tert-butyl-dimethyl-silanyloxy)-1-(4-ethoxy-phenylamino)-butan-2-ol

A solution of 4-ethoxy-aniline (commercial; 3.2 mL) in EtOH/water (9:1; 150 mL) was reacted with (2R)-2-[2-[[(tert-butyl)dimethylsilyl]oxy]ethyl]-oxirane (prepared according to WO 2007/144423) and further heated at 80° C. overnight. The solvents were removed under reduced pressure and the residue was purified by CC (EA/Hept 1:1), affording a brown oil (5.22 g; 62% yield).

MS (ESI, m/z): 340.2 [M+H⁺].

AL.ii. (R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-(4-ethoxy-phenyl)-oxazolidin-2-one

Starting from intermediate AL.i and using procedure I, the title compound was obtained as an off-white solid (4.30 g, 76% yield).

MS (ESI, m/z): 366.1 [M+H⁺].

AL.iii. (R)-3-(4-ethoxy-phenyl)-5-(2-hydroxy-ethyl)-oxazolidin-2-one

Starting from intermediate AL.ii and using procedure J, the title compound was obtained as an off-white solid (1.53 g, 52% yield).

MS (ESI, m/z): 251.9 [M+H⁺].

AL.iv. Methanesulfonic acid 2-[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-yl]-ethyl ester

Starting from intermediate AL.iii and using procedure H, the title compound was obtained as an off-white solid (1.89 g, 96% yield).

MS (ESI, m/z): 330.0 [M+H⁺].

Preparation AM: methanesulfonic acid 2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethyl ester AM.i. (R)-4-(tert-butyl-dimethyl-silanyloxy)-1-(4-propyl-phenylamino)-butan-2-ol

Starting from 4-propyl-aniline, the title compound was prepared in analogy to Preparation AL, step AL.i. A brown oil (6.99 g; 84% yield) was obtained.

MS (ESI, m/z): 338.2 [M+H⁺].

AM.ii. (R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-(4-propyl-phenyl)-oxazolidin-2-one

Starting from intermediate AM.i and using procedure I, the title compound was obtained as a brown oil (4.50 g, 60% yield).

MS (ESI, m/z): 364.1 [M+H⁺].

AM.iii. (R)-5-(2-hydroxy-ethyl)-3-(4-propyl-phenyl)-oxazolidin-2-one

Starting from intermediate AM.ii and using procedure J, the title compound was obtained as a yellowish solid (1.76 g, 57% yield).

MS (ESI, m/z): 249.9 [M+H⁺].

AM.iv. Methanesulfonic acid 2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate AM.iii and using procedure H, the title compound was obtained as an off-white solid (2.13 g, 93% yield).

MS (ESI, m/z): 328.4 [M+H⁺].

Preparation AN: methanesulfonic acid 2-[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethyl ester AN.i. (R)-4-(tert-butyl-dimethyl-silanyloxy)-1-(2,3-dihydro-benzo[1,4]dioxin-6-ylamino)-butan-2-ol

Starting from 2,3-dihydro-1,4-benzodioxin-6-amine (commercial), the title compound was prepared in analogy to Preparation AL, step AL.i. A brown oil (4.50 g; 51% yield) was obtained.

MS (ESI, m/z): 354.3 [M+H⁺].

AN.ii. (R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-oxazolidin-2-one

Starting from intermediate AN.i and using procedure I, the title compound was obtained as a yellow solid (3.42 g, 71% yield).

MS (ESI, m/z): 380.2 [M+H⁺].

AN.iii. (R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-5-(2-hydroxy-ethyl)-oxazolidin-2-one

Starting from intermediate AN.ii and using procedure J, the title compound was obtained as an off-white solid (1.72 g, 72% yield).

¹H NMR (CDCl₃) δ: 7.06 (d, J=2.6 Hz, 1H), 6.97 (dd, J=8.8, 2.6 Hz, 1H), 6.84 (m, 1H), 4.81 (m, 1H), 4.24 (m, 4H), 4.06 (t, J=8.8 Hz, 1H), 3.88 (m, 2H), 3.69 (dd, J=8.8, 7.3 Hz, 1H), 2.03 (m, 2H), 1.82 (br. s, 1H).

AN.iv. Methanesulfonic acid 2-[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethyl ester

Starting from intermediate AN.iii and using procedure H, the title compound was obtained as an off-white solid (2.03 g, 92% yield).

MS (ESI, m/z): 344.2 [M+H⁺].

Preparation AO: rac-methanesulfonic acid 2-{3-[4-(4-methoxy-benzyl)-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl]-2-oxo-oxazolidin-5-yl}-ethyl ester AO.i. 6-bromo-4-(4-methoxy-benzyl)-4H-pyrido[3,2-b][1,4]oxazin-3-one

A suspension of 6-bromo-2H-pyrido[3,2-b]-1,4-oxazin-3(4H)-one (2.0 g; prepared according to WO 01/30782) in DMF (40 mL) was treated with 4-methoxybenzyl chloride (1.18 mL) and Cs₂CO₃ (8.5 g) and stirred at rt for 2 h. The solvent was evaporated under reduced pressure and the residue was partitioned between EA and water. The org. layer was washed with brine, dried over MgSO₄ and evaporated under reduced pressure. The residue was triturated with Hept, affording a beige solid (2.8 g; 92% yield).

¹H NMR (CDCl₃) δ: 7.49 (d, J=8.8 Hz, 2H), 7.05 (s, 2H), 6.83 (d, J=8.8 Hz, 2H), 6.83 (d, J=8.8 Hz, 2H), 6.83 (d, J=8.8 Hz, 2H), 4.67 (s, 2H), 3.77 (s, 3H).

AO.ii. rac-1-azido-4-(tert-butyl-dimethyl-silanyloxy)-butan-2-ol

A solution of 2-[2-[[(tert-butyl)dimethylsilyl]oxy]ethyl]-oxirane (5.0 g; prepared according to WO 2007/144423) in MeOH (150 mL) was reacted with NaN₃ (3.95 g) and NH₄Cl (2.37 g). The reaction mixture was further stirred at 80° C. overnight. The solvent was evaporated under reduced pressure and the residue was partitioned between EA and water. The org. layer was washed with brine, dried over Na₂SO₄ and evaporated under reduced pressure, affording a yellow oil (4.9 g; 81% yield).

¹H NMR (CDCl₃) δ: 4.01 (m, 1H), 3.87 (m, 2H), 3.30 (m, 2H), 1.72 (m, 2H), 0.90 (m, 9H), 0.06 (m, 6H).

AO.iii. rac-1-amino-4-(tert-butyl-dimethyl-silanyloxy)-butan-2-ol

A solution of intermediate AO.ii (4.85 g) in THF (100 mL) was hydrogenated for 3 h over 10% Pd/C (1.0 g). The catalyst was filtered off and the filtrate was evaporated under reduced pressure, affording a yellow oil (4.1 g; 94.5% yield).

MS (ESI, m/z): 219.8 [M+H⁺].

AO.iv. rac-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-oxazolidin-2-one

Starting from intermediate AO.iii (4.0 g) and using procedure I, the title compound was obtained as a light yellow oil (3.3 g; 74% yield).

¹H NMR (CDCl₃) δ: 5.22 (br., 1H), 4.80 (m, 1H), 3.74 (m, 3H), 3.33 (m, 1H), 1.93 (m, 2H), 0.89 (m, 9H), 0.07 (m, 6H).

AO.v. rac-6-{5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4-(4-methoxy-benzyl)-4H-pyrido[3,2-b][1,4]oxazin-3-one

Intermediates AO.iv (1.97 g) and AO.i (2.8 g), CuI (305 mg) and K₂CO₃ (2.2 g) were placed in a round bottom flask which was then flushed with argon. Trans-1,2-diaminocyclohexane (1.2 mL) and dioxane (60 mL) were added to the mixture and the reaction flask was again flushed with argon. The reaction mixture was stirred at 100° C. for 2 days and partitioned between EA and water. The org. layer was washed with brine, dried over MgSO₄ and evaporated under reduced pressure. The residue was purified by CC (DCM/MeOH 19:1), affording, after crystallisation from Hept, a colourless solid (1.7 g; 41% yield).

¹H NMR (CDCl₃) δ: 7.81 (d, J=8.8 Hz, 1H), 7.28 (m, 3H), 6.81 (m, 2H), 5.20 (s, 2H), 4.82 (m, 1H), 4.28 (m, 1H), 3.85 (m, 3H), 3.77 (s, 3H), 2.00 (m, 2H), 0.89 (s, 9H), 0.07 (s, 6H).

AO.vi. rac-6-[5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4-(4-methoxy-benzyl)-4H-pyrido[3,2-b][1,4]oxazin-3-one

Starting from intermediate AO.v (1.7 g) and using procedure J, the title compound was obtained, after purification by CC (EA then EA/MeOH 9:1), as a yellow oil (1.4 g; 100% yield).

MS (ESI, m/z): 400.0 [M+H⁺].

AO.vii. rac-methanesulfonic acid 2-{3-[4-(4-methoxy-benzyl)-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl]-2-oxo-oxazolidin-5-yl}-ethyl ester

Starting from intermediate AO.vi (1.32 g) and using procedure H, the title compound was obtained as a colourless foam (1.3 g; 82.5% yield)

MS (ESI, m/z): 477.8 [M+H⁺].

Preparation AP: 6-[(S)-5-(2-amino-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one AP.i. 6-[(S)-5-(2-azido-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

A solution of intermediate L (1.90 g) in DMF (8 mL) was treated with NaN₃ (400 mg) and stirred at 80° C. overnight. The reaction mixture was diluted with water and extracted with EA. The org. layer was washed with water and brine, dried over MgSO₄ and evaporated under reduced pressure. The residue was stirred in ether/MeOH, affording a beige solid (1.30 g; 80% yield).

MS (ESI, m/z): 320.3 [M+H⁺].

AP.ii. 6-[(S)-5-(2-amino-ethyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate AP.i and using procedure F, the title compound was obtained as a beige solid (0.90 g, 82% yield).

MS (ESI, m/z): 294.4 [M+H⁺].

Preparation AQ: methanesulfonic acid 2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethyl ester

Starting from (2S)-2-[2-[[(tert-butyl)dimethylsilyl]oxy]ethyl]-oxirane, the title compound was prepared in analogy to Preparation AN.

The analytical data were identical with those of the compound of Preparation AN.

Preparation AR: 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propionaldehyde AR.i. (R)-1-azido-5-(tert-butyl-dimethyl-silanyloxy)-pentan-2-ol

Starting from (R)-2-[2-[[(tert-butyl)dimethylsilyl]oxy]propyl]-oxirane (5.0 g; prepared according to Organic Letters (2005), 7(18), 3997-4000) and NaN₃, the title compound was prepared in analogy to Preparation AO, step AO.ii. It was obtained as an oil (5.17 g; 86% yield).

¹H NMR (CDCl₃) δ: 3.79 (m, 1H), 3.68 (m, 2H), 3.29 (m, 2H), 1.66 (m, 4H), 0.90 (m, 9H), 0.07 (m, 6H).

AR.ii. (R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-propyl]-oxazolidin-2-one

The title compound was prepared in analogy to Preparation AO, steps AO.iii and AO.iv by hydrogenation of intermediate AR.ii using procedure F and reaction with CDI using procedure I. It was obtained as a colourless solid (3.48 g; 67% yield).

¹H NMR (CDCl₃) δ: 5.22 (br., 1H), 4.68 (m, 1H), 3.66 (m, 3H), 3.25 (t, J=7.6 Hz, 1H), 1.72 (m, 4H), 0.89 (m, 9H), 0.05 (m, 6H).

AR.iii. (R)-6-{5-[2-(tert-butyl-dimethyl-silanyloxy)-propyl]-2-oxo-oxazolidin-3-yl}-4-(4-methoxy-benzyl)-4H-pyrido[3,2-b][1,4]oxazin-3-one

Starting from intermediates AO.i (1.97 g) and AR.ii, the title compound was prepared in analogy to Preparation AO, step AO.v. It was obtained as a colourless foam (4.43 g; 70% yield).

¹H NMR (CDCl₃) δ: 7.80 (d, J=8.5 Hz, 1H), 7.28 (m, 3H), 6.81 (d, J=8.8 Hz, 2H), 5.20 (s, 2H), 4.67 (m, 3H), 4.22 (dd, J=10.0, 8.5 Hz, 1H), 3.77 (s, 3H), 3.70 (m, 2H), 1.78 (m, 4H), 0.90 (m, 9H), 0.06 (s, 6H).

AR.iv. (R)-6-[5-(2-hydroxy-propyl)-2-oxo-oxazolidin-3-yl]-4-(4-methoxy-benzyl)-4H-pyrido[3,2-b][1,4]oxazin-3-one

The title compound was prepared in analogy to Preparation AO, step AO.vi, starting from intermediate AR.iii. It was obtained as a colourless solid (640 mg; 38% yield).

¹H NMR (DMSO d6) δ: 11.16 (s, 1H), 7.57 (m, 1H), 7.40 (d, J=8.8 Hz, 1H), 4.68 (s, 1H), 4.59 (s, 2H), 4.47 (t, J=5.0 Hz, 1H), 4.19 (m, 1H), 3.69 (dd, J=10.0, 7.0 Hz, 1H), 3.43 (q, J=6.2 Hz, 2H), 1.73 (m, 2H), 1.51 (dd, J=9.7, 6.7 Hz, 2H).

AR.v. 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

A solution of SO₃.Pyr complex (900 mg) in DMSO (3 mL) was added dropwise at rt over 10 min to a suspension of intermediate AR.iv (830 mg) and DIPEA (1.45 mL) in DCM/DMSO (1:1; 5 mL). The mixture was further stirred at rt for 1 h, diluted with water and extracted with DCM. The org. layer was successively washed with water and brine, dried over MgSO₄, concentrated under reduced pressure and crystallized from ether/EA, affording a colourless solid (618 mg; 75% yield).

¹H NMR (DMSO d6) δ: 11.17 (s, 1H), 9.68 (s, 1H), 7.57 (m, 1H), 7.40 (d, J=8.8 Hz, 1H), 4.66 (m, 1H), 4.59 (s, 2H), 4.20 (m, 1H), 3.70 (dd, J=10.0, 7.0 Hz, 1H), 2.59 (m, 2H), 1.98 (m, 2H).

Preparation AS: (S)-1-amino-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one AS.i. 2-methoxy-8-vinyl-quinoline

(PPh₃)₄Pd (578 mg) was added at rt to a solution of vinylboronic anhydride pyridine complex (1.2 g) in DME (80 mL). The solution was degassed by bubbling N₂ through for 20 min. K₂CO₃ (1.38 g), water (24 mL) and trifluoro-methanesulfonic acid 2-methoxy-quinolin-8-yl ester (3.07 g) were added. The mixture was refluxed overnight, cooled to rt and partitioned between water and ether. The aq. phase was washed with ether and the combined org. phases were washed with water and brine, dried over MgSO₄, concentrated under reduced pressure and purified by CC (Hept/EA 4:1), affording a yellow liquid (1.18 g; 64% yield).

¹H NMR (CDCl₃) δ: 7.97 (d, J=8.8 Hz, 1H), 7.88 (m, 2H), 7.64 (dd, J=7.9, 1.5 Hz, 1H), 7.36 (t, J=7.6 Hz, 1H), 6.91 (d, J=8.8 Hz, 1H), 6.02 (dd, J=17.9, 1.8 Hz, 1H), 5.45 (dd, J=11.1, 1.8 Hz, 1H), 4.10 (s, 3H).

AS.ii. (R)-1-(2-methoxy-quinolin-8-yl)-ethane-1,2-diol

Starting from intermediate AS.i and AD-mix β and using procedure L, the title compound was obtained as a beige solid (3.22 g, quant).

MS (ESI, m/z): 279.3 [M+H⁺].

AS.iii. (R)-2-(tert-butyl-dimethyl-silanyloxy)-1-(2-methoxy-quinolin-8-yl)-ethanol

Starting from intermediate AS. ii and using procedure M, the title compound was obtained as a yellow oil (4.16 g, quant.).

MS (ESI, m/z): 334.0 [M+H⁺].

AS.iv. [(S)-2-(tert-butyl-dimethyl-silanyloxy)-1-(2-methoxy-quinolin-8-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate AS.iii (4.70 g), the title compound was prepared in analogy to Preparation Z, steps Z.iv (Mitsunobu reaction followed by azide reduction) and Z.v. (Boc protection using procedure G). It was obtained as a slightly yellow oil (8.4 g; quant.; contaminated by Boc₂O).

MS (ESI, m/z): 359.3 [M+H⁺].

AS.v. [(S)-2-hydroxy-1-(2-methoxy-quinolin-8-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate AS.iv (6.48 g) and using procedure J, the title compound was obtained as a colourless foam (2.99 g; 63% yield).

MS (ESI, m/z): 319.0 [M+H⁺].

AS.vi. ((S)-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate AS.v (3.34 g) and using procedure H (but heating the reaction mixture at 50° C.), the title compound was obtained as a colourless solid (2.64 g; 88% yield).

MS (ESI, m/z): 287.1 [M+H⁺].

AS.vii. (S)-1-amino-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate AS.vi (2.63 g) and using procedure B, the title compound was obtained as a colourless solid (1.58 g; 93% yield).

MS (ESI, m/z): 187.1 [M+H⁺].

Preparation AT: (S)-4-aminomethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one AT.i. Acetic acid (S)-3-azido-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl ester

Starting from intermediate V.ii (1.65 g) and using the same procedure as for the preparation of intermediate Z.iv, the title compound was obtained as a colourless oil (1.63 g; 90% yield).

MS (ESI, m/z): 302.0 [M+H⁺].

AT.ii. Acetic acid (S)-3-tert-butoxycarbonylamino-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl ester

Starting from intermediate AT.i (1.63 g) and using successively procedures F and G, the title compound was obtained as pale yellow oil (2.04 g; 100% yield).

MS (ESI, m/z): 376.2 [M+H⁺].

AT.iii. [(S)-3-hydroxy-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl]-carbamic acid tert-butyl ester

A suspension of intermediate AT.ii (2.05 g) and K₂CO₃ (3.02 g) in MeOH (72 mL) was stirred at rt for 30 min. The solvent was removed under reduced pressure and the residue was taken up in DCM/water. The org. layer was washed with brine, dried over MgSO₄, concentrated and purified by CC (DCM/MeOH/NH₄OH 1000:50:4), affording a colourless foam (1.28 g; 70% yield).

MS (ESI, m/z): 334.2 [M+H⁺].

AT.iv. ((S)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl)-carbamic acid tert-butyl ester

Starting from intermediate AT.iii (1.28 g) and using procedure H for the formation of the mesylate, followed by heating of the reaction mixture for 2 h at 60° C. to complete the cyclisation, the title compound was obtained as a colourless foam (985 mg; 85% yield).

MS (ESI, m/z): 302.2 [M+H⁺].

AT.v. (S)-4-aminomethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate AT.iv (980 mg) and using procedure B, the title compound was obtained as pale yellow solid (522 mg; 80% yield).

MS (ESI, m/z): 202.2 [M+H⁺].

Preparation AU: 3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

Starting from (S)-tert-butyl-dimethyl-(3-oxiranyl-propoxy)-silane (prepared according to Org. Lett. (2005), 7(19), 4083-4086), the title compound (obtained as a pink solid) was prepared in analogy to Preparation U in 4 steps (epoxide opening: 50% yield; oxazolidinone formation: 100% yield; alcohol deprotection: 71% yield; aldehyde formation: 91% yield).

The analytical data were identical with those of the compound of Preparation U.

Preparation AV: 3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

Starting from (S)-tert-butyl-dimethyl-(3-oxiranyl-propoxy)-silane (prepared according to Org. Lett. (2005), 7(19), 4083-4086), the title compound (obtained as a beige solid) was prepared in analogy to Preparation T in 4 steps (epoxide opening: 45% yield, oxazolidinone formation: 100% yield, alcohol deprotection: 65% yield, aldehyde formation: 87% yield).

The analytical data were identical with those of the compound of Preparation T.

Preparation AW: methanesulfonic acid 3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl ester AW.i. 6-[(S)-5-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-pentylamino]-4H-benzo[1,4]thiazin-3-one

A mixture of (S)-tert-butyl-dimethyl-(3-oxiranyl-propoxy)-silane (28.3 g, prepared according to Org. Lett. (2005), 7, 3997) and 6-amino-4H-benzo[1,4]thiazin-3-one (23.6 g) in MeCN (390 mL) was treated with LiClO₄ (41.8 g) and heated at 60° C. for 4 h. The volatiles were removed under reduced pressure and the residue partitioned between EA and brine. The org. phase was dried over MgSO₄ and concentrated. The residue was purified by CC (Hept/EA 1:1, EA) to give the desired intermediate as a yellowish foam (8.4 g; 16% yield).

MS (ESI, m/z): 397.1 [M+H⁺].

AW.ii. 6-{(S)-5-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]thiazin-3-one

A solution of intermediate AW.i (8.0 g) in THF (500 mL) was treated with CDI (4.9 g) and heated at 50° C. overnight. The mixture was cooled to rt, diluted with EA and washed with water and brine, dried over MgSO₄ and concentrated. The product was crystallized from Hept/EA to give the desired oxazolidinone as a beige solid (4.5 g; 53% yield).

MS (ESI, m/z): 423.4 [M+H⁺].

AW.iii. 6-[(S)-5-(3-hydroxy-propyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

A suspension of intermediate AW.ii (4.5 g) in THF (42 mL) was treated with 1M TBAF solution in THF (1 eq.). The brown solution was stirred at rt for 4 h, diluted with EA and washed with water and brine, dried over MgSO₄ and concentrated. The residue was purified by CC (EA then EA/MeOH 9:1) to give the desired alcohol as a yellowish foam (3.6 g; 100% yield).

MS (ESI, m/z): 309.3 [M+H⁺].

AW.iv. Methanesulfonic acid 3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl ester

A suspension of intermediate AW.iii (3.0 g) in DCM was treated with TEA (2.8 mL) and dropwise with MsCl (1.37 g). The mixture was stirred at rt for 2 h, diluted with DCM, washed with water, dried over MgSO₄ and concentrated. The residue was crystallized from ether/EA to give the desired mesylate as a beige solid (3.6 g; 93% yield).

MS (ESI, m/z): 387.2 [M+H⁺].

Preparation AX: rac-4-amino-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one AX.i. 7-fluoro-2-methoxy-8-vinyl-[1,5]naphthyridine

To a solution of 8-bromo-7-fluoro-2-methoxy-1,5-naphthyridine (5.0 g; commercial) in 1,2-DME (150 mL) was added tetrakis-(PPh₃)Pd (1.1 g) and the mixture was purged with N₂ for 20 min. K₂CO₃ (2.69 g), water (50 mL) and vinylboronic anhydride pyridine complex (2.34 g) were added. The mixture was stirred at reflux for 3 h. After cooling to rt, water was added and the mixture was extracted with EA. The combined org. phases were washed with brine, dried over MgSO₄, concentrated and purified by CC (EA/Hept 1:1), affording the title intermediate as a brown oil (3.12 g, 79% yield).

MS (ESI, m/z): 205.0 [M+H⁺].

AX.ii. (R)-1-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-ethane-1,2-diol

Starting from intermediate AX.i (3.12 g) and using procedure L with AD-mix (3, the title compound was obtained as an off-white solid (4 g, quant.).

MS (ESI, m/z): 239.0 [M+H⁺].

AX.iii. (R)-2-(tert-butyl-dimethyl-silanyloxy)-1-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-ethanol

To a solution of intermediate AX.ii (3.96 g) in DCM (160 mL) were added imidazole (1.05 eq.), TBDMSCl (1.05 eq.) and DMAP (0.1 eq.). The mixture was stirred at rt for 1 h. Water was added and the mixture was extracted with DCM. The org. layer was dried over MgSO₄ and concentrated to afford the title intermediate as a yellow oil (4.52 g, 77%).

MS (ESI, m/z): 353.2 [M+H⁺].

AX.iv. [(S)-2-(tert-butyl-dimethyl-silanyloxy)-1-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate AX.iii (4.52 g) and using procedure N′, the title intermediate was obtained as a light yellow oil (6.76 g, quant.).

MS (ESI, m/z): 452.2 [M+H⁺].

AX.v. [(S)-1-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate AX.iv (6.76 g) and using procedure J, the title intermediate was obtained as a yellow oil (3.96 g, 78% yield).

MS (ESI, m/z): 338.2 [M+H⁺].

AX.vi. ((S)-3-fluoro-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-yl)-carbamic acid tert-butyl ester

Starting from intermediate AX.v (3.46 g) and using procedure H followed by heating at 80° C. for 18 h in DCE, the title intermediate was obtained as a yellow oil (0.90 g, 28% yield).

MS (ESI, m/z): 306.2 [M+H⁺].

AX.vii. rac-4-amino-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate AX.vi (0.875 g) and using procedure B, the title intermediate was obtained as a pale yellow solid (0.42 g, 71% yield). An analysis of the ee-value indicated that the product was present as a racemate. Since no ee-determinations in previous steps have been made, a racemisation at an earlier stage in the synthetic sequence cannot be excluded.

MS (ESI, m/z): 206.1 [M+H⁺].

Preparation AY: methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from tert-butyl-dimethyl-[(S)-2-oxiranyl-ethoxy]-silane, the title compound was prepared in analogy to Preparation I.

The analytical data were identical with those of the compound of Preparation I.

Preparation AZ: (R)-6-amino-7-fluoro-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

The title compound was prepared as described in Preparation AD, using however AD-mix α in the first step.

The analytical data were identical with those of the compound of Preparation AD.

Preparation BA: 6-{5-[(1RS)-1-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-propyl]-((5RS)-2-oxo-oxazolidin-3-yl)}-4H-benzo[1,4]thiazin-3-one BA.i. (3RS)-3-(tert-butyl-dimethyl-silanyloxy)-3-((2RS)-oxiran-2-yl)-propionic acid tert-butyl ester

A solution of 3-[[(tert-butyl-dimethylsilyl]oxy]-4-pentenoic acid tert-butyl ester (3.60 g; prepared according to J. Org. Chem. (1994), 59, 4760-4764) in DCM (100 mL) was reacted with MCPBA (3.96 g) for 2 days. The reaction mixture was partitioned between DCM and an aq. solution containing Na₂S₂O₃ (10%) and NaHCO₃ (sat.). The org. phase was separated, dried over MgSO₄, evaporated under reduced pressure and purified by CC (Hept/EA 9:1 to 4:1), affording a colourless liquid (2.55 g; 67% yield; 3:2 mixture of diastereomers).

¹H NMR (CDCl₃) δ: 4.02 (m, 1H, diast. B), 3.76 (d, J=6.4 Hz, 1H, diast. A), 3.02 (m, 1H, diast. A), 2.99 (m, 1H, diast. B), 2.8-2.4 (m, 4H, diast. A and B), 1.45 (s, 9H, diast. A and B), 0.88 (m, 9H, diast. A and B), 0.10 (m, 6H, diast. A and B).

BA.ii. (3RS)-3-(tert-butyl-dimethyl-silanyloxy)-(4RS)-4-hydroxy-5-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-ylamino)-pentanoic acid tert-butyl ester

A solution of intermediate BA.i (6.05 g) and 6-amino-4H-benzo[1,4]thiazin-3-one (3.60 g) in EtOH/water (9:1; 100 mL) was refluxed for 30 h. The org. solvent was removed under reduced pressure and the residue was taken up in EA (20 mL) and filtered. The filtrate was concentrated under reduced pressure and purified by CC (Hept/EA 1:1 to 1:2), affording after trituration in EA/ether, a colourless solid (3.26 g; 34% yield).

MS (ESI, m/z): 483.2 [M+H⁺].

BA.iii. (3RS)-3-(tert-butyl-dimethyl-silanyloxy)-3-[((5RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl))-oxazolidin-5-yl]-propionic acid tert-butyl ester

Starting from intermediate BA.ii (3.25 g) and following procedure I, the title compound was obtained as a colourless solid (3.27 g; 95% yield).

MS (ESI, m/z): 509.1 [M+H⁺].

BA.iv. 6-{-[(1RS)-1-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-propyl]-((5RS)-2-oxo-oxazolidin-3-yl)}-4H-benzo[1,4]thiazin-3-one

Starting from intermediate BA.iii (1.01 g) and following procedure A, the title compound was obtained, after CC (Hept/EA 2:1 then 0:1), as a colourless foam (205 mg; 23% yield).

MS (ESI, m/z): 439.1 [M+H⁺].

Preparation BB: (R)-6-amino-7-fluoro-2-methoxy-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one BB.i. 6-fluoro-2,3-dimethoxy-quinoxaline-5-carbaldehyde

A solution of tetramethylpiperidine (16.4 mL) in dry THF (100 mL) was cooled to −78° C. and treated dropwise with n-BuLi (2.5M in Hex; 39 mL). The solution was further stirred at −78° C. for 30 min. A solution of 6-fluoro-2,3-dimethoxy-quinoxaline (15.6 g; prepared from the commercially available 2,3-dichloro-6-fluoroquinoxaline according to Egyptian Journal of Chemistry (1980), Volume Date 1977, 20, 427-39) in dry THF (450 mL) was cooled to −78° C., treated dropwise with the first solution and further stirred at −78° C. for 30 min. The resulting reaction mixture was treated with DMF (11.56 mL) and further stirred at −78° C. for 15 min. The reaction mixture was poured onto a mixture of a sat. NH₄Cl solution and ice and extracted with ether. The org. layer was washed with brine, dried over MgSO₄, evaporated under reduced pressure and crystallised from Hex/EA affording a light yellow solid (12.5 g; 71% yield).

¹H NMR (CDCl₃) δ: 11.10 (d, J=0.6 Hz, 1H), 7.96 (dd, J=9.1, 5.3 Hz, 1H), 7.30 (m, 1H), 4.19 (m, 3H), 4.15 (m, 3H).

BB.ii. 6-fluoro-2,3-dimethoxy-5-vinyl-quinoxaline

A suspension of methyltriphenylphosphonium bromide (18.15 g) in THF (200 mL) was treated with tBuOK (5.7 g). After stirring for 1 h, the solution was cooled to 0° C. and treated with a solution of intermediate BB.i (10.0 g) in THF (100 mL). The reaction mixture was further stirred at rt for 3 h and sequentially washed with water and with a sat. NH₄Cl solution. The org. layer was dried over MgSO₄, evaporated and purified by CC (Hex/EA 4:1 to 2:1), affording a colourless solid (8.80 g; 89% yield).

¹H NMR (CDCl₃) δ: 7.62 (dd, J=8.8, 5.3 Hz, 1H), 7.46 (m, 1H), 7.25 (m, 1H), 6.34 (m, 1H), 5.69 (m, 1H), 4.17 (s, 3H), 4.13 (s, 3H).

BB.iii. (S)-1-(6-fluoro-2,3-dimethoxy-quinoxalin-5-yl)-ethane-1,2-diol

Starting from intermediate BB.ii (8.70 g) and using procedure L with AD-mix α, the title compound was obtained as a beige solid (5.60 g; 56% yield) after crystallization from ether.

¹H NMR (DMSO d6) δ: 7.67 (dd, J=9.1, 5.6 Hz, 1H), 7.35 (dd, J=10.3, 9.1 Hz, 1H), 5.56 (m, 1H), 5.20 (d, J=6.4 Hz, 1H), 4.73 (t, J=6.2 Hz, 1H), 4.05 (s, 3H), 4.01 (s, 3H), 3.87 (m, 1H), 3.69 (m, 1H).

BB.iv. (S)-2-(tert-butyl-dimethyl-silanyloxy)-1-(6-fluoro-2,3-dimethoxy-quinoxalin-5-yl)-ethanol

Starting from intermediate BB.iii (5.50 g) and using procedure M, the title compound was obtained, after purification by CC (Hept/EA 2:1), as a yellow oil (7.40 g; 94% yield).

MS (ESI, m/z): 383.2 [M+H⁺].

BB.v. [(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-(6-fluoro-2,3-dimethoxy-quinoxalin-5-yl)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate BB.iv (7.30 g) and using procedure N′, the title compound was obtained, after purification by CC (Hept/EA 9:1 t 4:1), as a yellow oil (6.7 g, 73% yield).

¹H NMR (CDCl₃) δ: 7.66 (dd, J=9.1, 5.6 Hz, 1H), 7.23 (m, 1H), 6.50 (m, 1H), 4.17 (s, 3H), 4.13 (s, 3H), 3.92 (d, J=6.4 Hz, 2H), 1.42 (s, 9H), 0.76 (s, 9H), −0.09 (s, 3H), −0.14 (s, 3H).

BB.vi. [(R)-1-(6-fluoro-2,3-dimethoxy-quinoxalin-5-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate BB.v (6.70 g) and using procedure J, the title compound was obtained, after crystallization from Hept/EA 1:1, as a colourless solid (3.60 g; 70% yield).

¹H NMR (CDCl₃) δ: 7.69 (dd, J=9.1, 5.6 Hz, 1H) 7.26 (m, 1H), 6.60 (m, 1H), 5.80 (m, 1H), 4.17 (s, 3H), 4.13 (s, 3H), 3.95 (m, 2H), 1.43 (s, 9H).

BB.vii. ((R)-7-fluoro-2-methoxy-3-oxo-5,6-dihydro-3H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-carbamic acid tert-butyl ester

Starting from intermediate BB.vi (3.50 g) and using procedure H, the intermediate mesylate was formed. The reaction mixture was further stirred at reflux for 12 h, cooled to rt, washed with water. The org. layer was dried over MgSO₄ and concentrated under reduced pressure affording a crude solid (2.70 g, 84% yield) containing the title compound in a 3:2 mixture with (R)-4-(6-fluoro-2,3-dimethoxy-quinoxalin-5-yl)-oxazolidin-2-one. The mixture was used without any further purification in the next step.

BB.viii. (R)-6-amino-7-fluoro-2-methoxy-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from intermediate BB.vii (2.70 g) and using procedure B, the title compound was obtained after purification by CC (EA/MeOH 9:1 containing 1% NH₄OH) as a colourless solid (469 mg; 25% yield).

MS (ESI, m/z): 236.2 [M+H⁺].

Preparation BC: (R)-1-amino-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

The title compound was prepared in analogy to Preparation AS, using however AD-mix α in the second step.

The analytical data were identical with those of the compound of Preparation AS.

Preparation BD: toluene-4-sulfonic acid (R)-4-hydroxy-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester BD.i. 2-(6-methoxy-[1,5]naphthyridin-4-yl)-propane-1,3-diol

A solution of 2-methoxy-8-methyl-1,5-naphthyridine (2.90 g; prepared according to WO 00/21948) in aq. formaldehyde (37%; 7.8 mL) was heated at 100° C. for 3 days. After cooling to rt, the reaction mixture was concentrated to dryness and the residue was taken up in MeOH (10 mL) and concentrated again. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8) to give a colourless solid (2.78 g; 71% yield).

¹H NMR (DMSO-d₆) δ: 8.67 (d, J=4.4 Hz, 1H), 8.22 (d, J=9.1 Hz, 1H), 7.51 (d, J=4.4 Hz, 1H), 7.22 (d, J=9.1 Hz, 1H), 4.56 (m, 2H), 4.00 (m, 4H), 3.84 (m, 4H).

BD.ii. Acetic acid (S)-3-hydroxy-2-(6-methoxy-[1,5]naphthyridin-4-yl)-propyl ester

A solution of intermediate BD.i (1.34 g) in vinyl acetate (10 mL) was treated with powdered 3 Å molecular sieves (78 mg) and stirred at rt for 15 min under an atmosphere of nitrogen. Lipase acrylic resin from Candida antarctica (600 mg, Sigma L4777) was added and stirring was continued for 4 h at rt. The polymer bound enzyme was filtered off, the filter cake was rinsed with THF and the filtrate was concentrated. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:25:2), affording a colourless oil (0.688 g; 44% yield).

¹H NMR (CDCl₃) δ: 8.72 (d, J=4.7 Hz, 1H), 8.23 (d, J=9.1 Hz, 1H), 7.46 (d, J=4.7 Hz, 1H), 7.15 (d, J=9.1 Hz, 1H), 4.64 (m, 2H), 4.24 (m, 1H), 4.08 (m, 5H), 2.05 (s, 3H).

BD.iii. Acetic acid (S)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester

A solution of intermediate BD.ii (2.05 g) in DCM (40 mL) was transformed into the corresponding mesylate using procedure H. After full consumption of the alcohol, DCE (40 mL) was added and the solution was further stirred at 60° C. for 4 h. After cooling to rt, water was added and the two layers were decanted and the aq. layer was extracted once more with DCM. The combined org. layers were concentrated to dryness. The residue was triturated with TBME, affording a grey solid (1.40 g; 77% yield).

¹H NMR (CDCl₃) δ: 8.53 (d, J=4.7 Hz, 1H), 7.93 (d, J=9.7 Hz, 1H), 7.34 (dd, J=4.7, 0.9 Hz, 1H), 6.90 (d, J=9.7 Hz, 1H), 4.57 (dd, J=12.9, 9.4 Hz, 1H), 4.37 (d, J=6.4 Hz, 2H), 4.27 (dd, J=13.2, 5.0 Hz, 1H), 4.09 (m, 1H), 2.06 (s, 3H).

BD.iv. (S)-4-hydroxymethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

To a solution of intermediate BD.iii (1.11 g) in MeOH (30 mL), cooled to −10° C., K₂CO₃ (313 mg, 0.5 eq.) was added and the mixture was vigorously stirred at 0° C. for 20 min. The mixture was concentrated and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8), affording a colourless solid (773 mg; 84% yield).

MS (ESI, m/z): 203.0 [M+H⁺].

BD.v. Methanesulfonic acid (S)-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester

A solution of intermediate BD.iv (600 mg) in DCM (30 mL) was transformed into the corresponding mesylate using procedure H. The crude material (1.03 g) was used in the next step without any further purification.

MS (ESI, m/z): 281.2 [M+H⁺].

BD.vi. 4-methylene-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

A solution of intermediate BD.v (1.03 g) in DMF (10 mL) was stirred at rt in the presence of DBU (1.12 mL) for 2 h. The reaction mixture was diluted with EA and water. The aq. layer was extracted with EA (2×100 mL) and DCM/MeOH (3×50 mL; 9:1). The combined org. layers were sequentially washed with water and brine and dried over MgSO₄. The solvent was evaporated under reduced pressure, affording a yellow solid (490 mg; 72% yield).

¹H NMR (CDCl₃) δ: 8.55 (d, J=5.0 Hz, 1H), 7.96 (d, J=9.7 Hz, 1H), 7.44 (d, J=5.0 Hz, 1H), 6.92 (d, J=9.7 Hz, 1H), 6.00 (td, J=2.9, 0.9 Hz, 1H), 5.65 (td, J=2.6, 0.9 Hz, 1H), 5.02 (t, J=2.6 Hz, 2H).

BD.vii. (R)-4-hydroxy-4-hydroxymethyl-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

A solution of intermediate BD.vi (240 mg) was dihydroxylated in presence of AD-mix α using procedure L. The crude yellow solid (216 mg; 76% yield) was used in the next step without any further purification.

¹H NMR (CDCl₃) δ: 8.55 (d, J=4.7 Hz, 1H), 7.90 (m, 1H), 7.53 (d, J=4.7 Hz, 1H), 6.81 (m, 1H), 4.35 (m, 2H), 3.89 (m, 3H).

BD.viii. Toluene-4-sulfonic acid (R)-4-hydroxy-7-oxo-4,5-dihydro-7H-pyrrolo[3,2,1-de][1,5]naphthyridin-4-ylmethyl ester

A solution of intermediate BD.vii (210 mg) was stirred at rt overnight in presence of TEA (0.20 mL), TsCl (185 mg) and dibutyltin oxide (12 mg). The reaction mixture was diluted with water (3 mL). The org. layer was washed with sat. NaHCO₃ and brine and dried over MgSO₄. The solvent was evaporated under reduced pressure, affording an off-white solid (172 mg; 48% yield).

MS (ESI, m/z): 373.0 [M+H⁺].

Preparation BE: rac-1-amino-9-bromo-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BE.i. (7-bromo-2-methoxy-quinolin-8-yl)-methanol

A suspension of 7-bromo-8-bromomethyl-2-(methyloxy)quinoline (35.2 g; prepared according to WO 2007/081597; containing 20% of debrominated compound) in acetone/water (1:1; 860 mL) was refluxed for 6 h in presence of NaHCO₃ (14.63 g). The org. solvent was removed under reduced pressure and the residue was extracted with EA. The org. layer was washed with brine and dried over Na₂SO₄. The solvent was then evaporated and the residue was crystallized from TBDME, affording an off-white solid (16.0 g; 56% yield).

MS (ESI, m/z): 268.0 [M+H⁺].

BE.ii. 7-bromo-2-methoxy-quinoline-8-carbaldehyde

A solution of oxalyl chloride (9.47 mL) in DCM (200 mL) was cooled to −78° C. and treated dropwise with a solution of DMSO (9.52 mL) in DCM (80 mL). After stirring for 15 min, the solution was treated with a solution of intermediate BE.i (10.0 g) in DCM (80 mL). After further stirring at −78° C. for 3 h, the reaction mixture was treated dropwise with a solution of TEA (39.0 mL) in DCM (80 mL) over 1 h. The reaction mixture was further stirred for 40 min and allowed to reach rt. The reaction mixture was than treated with a sat. NaHCO₃ solution. The org. layer was separated and washed with brine, dried over Na₂SO₄. The solvent was evaporated and the residue was dissolved in EA and filtered through a pad of silica gel, affording a pale yellow solid (3.74 g; 38% yield).

¹H NMR (DMSO-d₆) δ: 11.06 (s, 1H), 8.36 (d, J=8.8 Hz, 1H), 8.04 (d, J=8.8 Hz, 1H), 7.74 (m, 1H), 7.17 (d, J=8.8 Hz, 1H), 4.01 (s, 4H).

BE.iii. 7-bromo-2-methoxy-8-vinyl-quinoline

To a solution of methyltriphenylphosphonium bromide (1.00 g) in THF (8 mL) cooled to −78° C. was added n-BuLi (2.5M in Hex, 1.09 mL, 1.5 eq.). The mixture was stirred 15 min at this temperature and then 45 min at 0° C. before cooling again to −78° C. A solution of intermediate BE.ii (500 mg) in THF (8 mL) was quickly added. The reaction proceeded overnight with gradual warming to rt. MeOH was added to quench the reaction and the mixture was concentrated under reduced pressure. The residue was purified by CC (Hept/EA 4:1 to 2:1), affording the title compound as a yellowish oil (411 mg; 83% yield).

MS (ESI, m/z): 264.3 [M+H⁺].

BE.iv. rac-1-(7-bromo-2-methoxy-quinolin-8-yl)-ethane-1,2-diol

Starting from intermediate BE.iii (5.50 g) and proceeding in analogy to Preparation AX, step AX.ii, using however K₂OsO₄/NMO instead of AD-mix β and omitting the use of methylsulfonamide, the title compound was obtained as a beige solid (5.75 g, 93% yield) after crystallization from TBDME.

¹H NMR (CDCl₃) δ: 8.01 (d, J=9.1 Hz, 1H), 7.58 (m, 1H), 7.50 (m, 1H), 6.97 (m, 1H), 5.53 (m, 1H), 4.07 (s, 3H), 3.91 (m, 2H).

BE.v. rac-1-(7-bromo-2-methoxy-quinolin-8-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethanol

Starting from intermediate BE.iv (5.70 g) and using procedure M, the title compound was obtained as a brown oil (7.79 g, 99% yield).

¹H NMR (CDCl₃) δ: 7.97 (d, J=8.8 Hz, 1H), 7.55 (m, 1H), 7.45 (m, 1H), 6.93 (d, J=8.8 Hz, 1H), 5.54 (t, J=5.6 Hz, 1H), 4.12 (m, 1H), 4.04 (s, 3H), 3.98 (m, 1H), 0.75 (m, 9H), −0.14 (d, J=0.9 Hz, 6H).

BE.vi. rac-1-(7-bromo-2-methoxy-quinolin-8-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethylamine

Starting from intermediate BE.v (7.75 g), the title compound was prepared in analogy to Preparation Z, step Z.iv. A yellow oil (2.6 g; 33% yield) was obtained.

MS (ESI, m/z): 411.3 [M+H⁺].

BE.vii. rac-[1-(7-bromo-2-methoxy-quinolin-8-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate BE.vi (2.60 g) and using procedure G, the title compound was obtained as a yellow oil (3.20 g, 99% yield).

¹H NMR (CDCl₃) δ: 7.95 (d, J=9.1 Hz, 1H), 7.55 (m, 1H), 7.44 (m, 1H), 6.92 (d, J=9.1 Hz, 1H), 6.35 (m, 1H), 4.97 (m, 1H), 4.06 (m, 3H), 4.03 (m, 1H), 3.74 (m, 1H), 1.25 (m, 9H), 0.75 (s, 9H), −0.11 (s, 6H).

BE.viii. rac-[1-(7-bromo-2-methoxy-quinolin-8-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate BE.vii (3.20 g) and using procedure J, the title compound was obtained as an off-white solid (1.70 g, 68% yield).

¹H NMR (CDCl₃) δ: 7.98 (d, J=9.1 Hz, 1H), 7.60 (m, 1H), 7.49 (m, 1H), 6.96 (d, J=8.8 Hz, 1H), 5.92 (m, 1H), 4.08 (m, 4H), 4.03 (m, 2H), 1.44 (s, 9H).

BE.ix. rac-(9-bromo-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BE.viii (400 mg) and using the same procedure as for the preparation of intermediate Z.vi, the title compound was obtained as a yellow solid (372 mg, 100% yield).

¹H NMR (CDCl₃) δ: 7.67 (d, J=9.4 Hz, 1H), 7.32 (m, 2H), 6.68 (m, 1H), 5.58 (m, 1H), 4.97 (m, 1H), 4.64 (m, 1H), 4.32 (m, 1H), 1.24 (m, 9H).

MS (ESI, m/z): 365.3 [M+H⁺].

BE.x. rac-1-amino-9-bromo-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BE.ix (100 mg) and using procedure B, the title compound was obtained as an off-white solid (52 mg, 72% yield).

¹H NMR (CDCl₃) δ: 7.67 (d, J=9.7 Hz, 1H), 7.33 (m, 2H), 6.68 (d, J=9.7 Hz, 1H), 4.89 (dd, J=8.8, 3.5 Hz, 1H), 4.62 (dd, J=13.5, 8.5 Hz, 1H), 4.17 (dd, J=13.5, 3.8 Hz, 1H), 1.80 (m, 2H).

Preparation BF: (R)-1-amino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic acid ethyl ester

BF.i. 2-methoxy-8-vinyl-quinoline-5-carboxylic acid ethyl ester

A solution of vinylboronic anhydride pyridine complex (1:1; 3.81 g) in DMF (240 mL) was treated with tetrakis(triphenylphosphine)palladium(0) (731 mg) and stirred under nitrogen for 20 min. The reaction mixture was sequentially treated with K₂CO₃ (4.372 g) water (73 mL) and 2-methoxy-8-[[(trifluoromethyl)sulfonyl]oxy]-5-quinoline carboxylic acid ethyl ester (12.0 g; prepared in analogy to the corresponding n-butyl ester described in WO 2006/046552) and further stirred at 85° C. overnight. The reaction mixture was diluted with water and extracted with ether. The org. layer was dried over MgSO₄, concentrated to dryness and purified by CC (Hex/EA, 4:1), affording a yellow oil (5.40 g; 66% yield).

¹H NMR (CDCl₃) δ: 9.20 (d, J=9.1 Hz, 1H), 8.08 (dd, J=7.9, 0.6 Hz, 1H), 7.96 (dd, J=18.2, 11.1 Hz, 1H), 7.86 (d, J=7.9 Hz, 1H), 7.02 (d, J=9.4 Hz, 1H), 6.05 (dd, J=18.2, 1.5 Hz, 1H), 5.54 (dd, J=11.1, 1.5 Hz, 1H), 4.45 (q, J=7.3 Hz, 2H), 4.10 (s, 3H), 1.45 (t, J=7.0 Hz, 3H).

BF.ii. 8-((S)-1,2-dihydroxy-ethyl)-2-methoxy-quinoline-5-carboxylic acid ethyl ester

A solution of intermediate BF.i (5.40 g) was dihydroxylated in the presence of AD-mix α using procedure L. After crystallization from ether, the product was obtained as a white solid (4.30 g; 70% yield; enantiomeric excess not checked, assumed 100%).

¹H NMR (DMSO d6) δ: 9.05 (d, J=9.4 Hz, 1H), 8.04 (m, 1H), 7.87 (d, J=7.9 Hz, 1H), 7.15 (d, J=9.4 Hz, 1H), 5.66 (m, 1H), 5.35 (m, 1H), 4.67 (m, 1H), 4.37 (q, J=7.0 Hz, 2H), 4.00 (s, 3H), 3.79 (m, 1H), 3.43 (m, 1H), 1.35 (t, J=7.3 Hz, 3H)

BF.iii. 8-[(S)-2-(tert-butyl-dimethyl-silanyloxy)-1-hydroxy-ethyl]-2-methoxy-quinoline-5-carboxylic acid ethyl ester

Starting from intermediate BF.ii (4.20 g) and using procedure M, the title intermediate was obtained as a yellow oil (5.48 g; 94% yield).

MS (ESI, m/z): 406.2 [M+H⁺].

BF.iv. 8-[(R)-1-tert-butoxycarbonylamino-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-methoxy-quinoline-5-carboxylic acid ethyl ester

A solution of intermediate BF.iii (5.30 g) and PPh₃ (4.11 g) in THF (130 mL) was cooled to 0° C. and treated dropwise with DPPA (3.4 mL) and DIAD (3.36 mL). The reaction mixture was stirred at 0° C. for 15 min than at rt for 1.5 h. The reaction mixture was evaporated to dryness and purified by CC (Hept/EA 2:1), affording the intermediate azide as a yellow oil (6.0 g). The latter was dissolved in THF/water (9:1; 50 mL), treated with PPh₃ (4.1 g) and stirred at 50° C. for 1.5 h. The reaction mixture was then reacted with Boc₂O (5.7 g) and further stirred at rt over the weekend. The reaction mixture was concentrated under reduced pressure and purified by CC (Hept/EA 9:1 to 4:1), affording a yellow oil (9.20 g; contaminated by remaining Boc₂O).

¹H NMR (CDCl₃) δ: 9.21 (d, J=9.4 Hz, 1H), 8.05 (d, J=7.9 Hz, 1H), 7.59 (d, J=7.6 Hz, 1H), 7.01 (d, J=9.4 Hz, 1H), 5.64 (t, J=4.7 Hz, 1H), 4.44 (q, J=7.0 Hz, 2H), 4.07 (m, 5H), 1.50 (m, 3H), 1.44 (s, 9H), 0.76 (s, 9H), −0.23 (m, 6H).

BF.v. 8-((R)-1-tert-butoxycarbonylamino-2-hydroxy-ethyl)-2-methoxy-quinoline-5-carboxylic acid ethyl ester

Starting from intermediate BF.iv (6.56 g) and using procedure J, the title intermediate was obtained as a colourless solid (2.60 g; 51% yield).

¹H NMR (CDCl₃) δ: 9.22 (d, J=9.4 Hz, 1H), 8.06 (d, J=7.6 Hz, 1H), 7.62 (d, J=7.9 Hz, 1H), 7.04 (d, J=9.4 Hz, 1H), 5.55 (m, 1H), 4.44 (q, J=7.3 Hz, 2H), 4.03 (m, 5H), 1.44 (s, 9H).

BF.vi. (R)-1-tert-butoxycarbonylamino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic acid ethyl ester

Starting from intermediate BF.v (2.40 g) and using procedure H, the title intermediate was obtained as a colourless solid after trituration in ether (2.10 g; 95% yield).

MS (ESI, m/z): 359.2 [M+H⁺].

BF.vii. (R)-1-amino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic acid ethyl ester

Starting from intermediate BF.vi (1.00 g) and using procedure B, the title compound was obtained as a beige solid (690 mg; 96% yield).

MS (ESI, m/z): 259.2 [M+H⁺].

Preparation BG: (R)-1-amino-7-hydroxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BG.i. ((R)-7-hydroxymethyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BF.vi (250 mg) and using procedure A, the title intermediate was obtained as a yellowish solid after trituration in ether (190 mg; 86% yield).

MS (ESI, m/z): 317.2 [M+H⁺].

BG.ii. (R)-1-aAmino-7-hydroxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BG.i (180 mg) and using procedure B, the title compound was isolated from the water phase after evaporation to dryness and suspension in DCM/MeOH (9:1), affording 400 mg of a beige solid (contaminated by inorganic salts). The material was used without any further purification in the next steps.

¹H NMR (DMSO d6) δ: 8.10 (d, J=9.7 Hz, 1H), 7.65 (d, J=7.6 Hz, 1H), 7.27 (d, J=7.6 Hz, 1H), 6.61 (d, J=9.7 Hz, 1H), 5.41 (m, 1H), 5.19 (m, 1H), 4.79 (m, 2H), 4.55 (dd, J=13.5, 8.5 Hz, 1H), 4.22 (dd, J=13.5, 3.2 Hz, 1H), 4.07 (ddd, J=3.2, 2.1, 0.9 Hz, 1H).

Preparation BH: (R)-1-amino-7-dimethylaminomethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BH.i. ((R)-7-formyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A solution of intermediate BG.i (640 mg) in DCM/THF (40 mL; 2:1) was stirred in the presence of MnO₂ (3.75 g) for 30 min. The reaction mixture was filtered through Celite® and the filtrate was evaporated to dryness. The residue was triturated in ether/Hept, affording a yellow solid (480 mg; 75% yield).

¹H NMR (CDCl₃) δ: 10.19 (s, 1H), 8.84 (d, J=9.7 Hz, 1H), 7.69 (m, 2H), 6.81 (d, J=9.7 Hz, 1H), 5.66 (m, 1H), 5.11 (m, 1H), 4.74 (dd, J=13.8, 9.1 Hz, 1H), 4.25 (m, 1H), 1.45 (m, 9H).

BH.ii. ((R)-7-dimethylaminomethyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BH.i (200 mg) and NHMe₂ (0.11 mL; 5.6M in EtOH) and using procedure E, the title intermediate was obtained as a yellow solid (140 mg; 64% yield).

MS (ESI, m/z): 344.6 [M+H⁺].

BH.iii. (R)-1-amino-7-dimethylaminomethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BH.ii (140 mg) and using procedure B, the title compound was obtained as an orange oil (74 mg; 76% yield).

MS (ESI, m/z): 244.3 [M+H⁺].

Preparation BI: (R)-1-amino-7-pyrrolidin-1-ylmethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BI.i. ((R)-4-oxo-7-pyrrolidin-1-ylmethyl-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BH.i (200 mg) and pyrrolidine (52 μL) and using procedure E, the title intermediate was obtained as a yellow solid (190 mg; 80% yield).

MS (ESI, m/z): 370.4 [M+H⁺].

BI.ii. (R)-1-amino-7-pyrrolidin-1-ylmethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BI.i (190 mg) and using procedure B, the title compound was obtained as an orange oil (100 mg; 72% yield).

MS (ESI, m/z): 269.9 [M+H⁺].

Preparation BJ: 3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

The title compound was prepared in analogy to Preparation AR, starting however from (S)-2-[2-[[(tert-butyl)dimethylsilyl]oxy]propyl]-oxirane. The yields were similar and the analytical data (MS, ¹H NMR) were identical.

Preparation BK: 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionaldehyde BK.i. (2-tert-butoxycarbonylamino-6-chloro-pyridin-3-ylsulfanyl)-acetic acid ethyl ester

A solution of TMEDA (1.677 mL) in THF (20 mL) was cooled to −20° C. and treated dropwise with 2.3M n-BuLi (4.75 mL). After stirring at this temperature for 20 min, the solution was cooled to −78° C. and treated dropwise with a solution of 2-tert-butoxycarbonylamino-6-chloropyridine (1.14 g; commercial) in THF (7.5 mL). The solution was further stirred at this temperature for 1 h and treated with sulfur (S8). After further stirring at this temperature for 20 min the reaction mixture was treated with ethyl bromoacetate (0.86 mL). After further stirring for 2 h at −78° C., the temperature was allowed to reach −45° C. and quenched by the addition of EA and water. The org phase was sequentially washed with 1N HCl, conc. NH₄Cl solution and brine. The org. phase was dried over MgSO₄ and the solvents were evaporated. The residue was purified by CC (Hept/EA 4:1 to 2:1), affording a colourless oil (1.05 g; 60% yield).

¹H NMR (CDCl₃) δ: 8.01 (s, 1H), 7.79 (d, J=8.2 Hz, 1H), 6.98 (d, J=8.2 Hz, 1H), 4.14 (q, J=7.0 Hz, 3H), 3.47 (s, 2H), 1.54 (s, 12H), 1.22 (t, J=7.0 Hz, 3H).

BK.ii. 6-chloro-4H-pyrido[3, 2-b][1,4]thiazin-3-one

A solution of intermediate BK.i (1.0 g) in DCM (6 mL) was stirred at rt overnight in the presence of TFA (6 mL). The reaction mixture was evaporated to dryness and the residue was dissolved in EtOH and refluxed for 2 days. The reaction mixture was evaporated to dryness and the residue was taken up in EA and a sat. aq. NaHCO₃ solution. The org. layer was washed with brine, dried over MgSO₄, concentrated under reduced pressure and crystallized from ether/Hept, affording a yellow solid (400 mg; 69% yield).

¹H NMR (CDCl₃) δ: 8.28 (d, J=1.5 Hz, 1H), 7.57 (dd, J=8.2, 0.6 Hz, 1H), 6.98 (d, J=8.2 Hz, 1H), 3.50 (m, 2H).

BK.iii. 6-{(R)-5-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-2-oxo-oxazolidin-3-yl}-4H-pyrido[3,2-b][1,4]thiazin-3-one

A vial was charged with intermediate BK.ii (2 g), palladium(II)acetate (224 mg), DPEphos (1.08 g), potassium phosphate tribasic (powdered; 4.33 g) and intermediate AR.ii (3.1 g). Dioxane (dry, over molecular sieves, 50 mL) was then added using a syringe and the resulting suspension was sparged with argon for 5 min. The mixture was then heated in a sealed flask at 80° C. overnight. The residue was extracted with EA/water. The org. layer was washed with brine, dried over MgSO₄ and concentrated. The residue was purified by CC (Hept/EA 2:1, 1:1) affording a yellowish solid (3.58 g; 84% yield).

¹H NMR (DMSO d6) δ: 10.81 (s, 1H), 7.77 (m, 1H), 7.66 (m, 1H), 4.71 (m, 1H), 4.20 (m, 1H), 3.69 (dd, J=10.5, 7.3 Hz, 1H), 3.62 (t, J=6.4 Hz, 2H), 3.51 (s, 2H), 1.74 (m, 2H), 1.56 (dd, J=9.4, 7.3 Hz, 2H), 0.85 (m, 9H), 0.02 (s, 6H).

BK.iv. 6-[(R)-5-(3-hydroxy-propyl)-2-oxo-oxazolidin-3-yl]-4H-pyrido[3,2-b][1,4]thiazin-3-one

Starting from intermediate BK.iii (3.58 g) and using procedure J, the title intermediate was obtained as a colourless solid (2.0 g; 76% yield).

¹H NMR (DMSO d6) δ: 10.83 (s, 1H), 7.77 (m, 1H), 7.66 (m, 1H), 4.70 (m, 1H), 4.48 (t, J=5.3 Hz, 1H), 4.20 (m, 1H), 3.70 (dd, J=10.3, 7.0 Hz, 1H), 3.51 (s, 2H), 3.43 (q, J=6.2 Hz, 2H), 3.28 (s, 3H), 1.75 (m, 2H), 1.51 (m, 2H).

BK.v. 3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl-oxazolidin-5-yl]-propionaldehyde

Starting from intermediate BK.iv (250 mg) and using the procedure of Preparation U, step U.iv, the title compound was obtained as a colourless solid (200 mg; 80% yield).

MS (ESI, m/z): 308.3 [M+H⁺].

Preparation BL: 3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionaldehyde

The title compound was prepared in analogy to Preparation BK, starting however from (S)-2-[2-[[(tert-butyl)dimethylsilyl]oxy]propyl]-oxirane. The yields were similar and the analytical data (MS, ¹H NMR) were identical.

Preparation BM: (R)-4-amino-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one BM.i. rac-1-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-ethane-1,2-diol

Starting from intermediate Ax.i (12.75 g) and proceeding in analogy to Preparation AX, step AX.ii, using however K₂OsO₄/NMO instead of AD-mix β and omitting the use of methylsulfonamide, the title compound was isolated as a light brown solid (9.80 g; 66% yield).

MS (ESI, m/z): 238.4 [M+H⁺].

BM.ii. rac-2-(tert-butyl-dimethyl-silanyloxy)-1-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-ethanol

Starting from intermediate BM.i (12.35 g) and using procedure M, the title intermediate was obtained as a brown oil (18.85 g; 100% yield).

MS (ESI, m/z): 353.4 [M+H⁺].

BM.iii. rac-8-[1-azido-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-7-fluoro-2-methoxy-[1,5]naphthyridine

Starting from intermediate BM.ii (18.85 g) and using procedure N, the title intermediate was obtained as an orange oil (22.2 g; contaminated with PPh₃O).

¹HNMR (CDCl₃) δ: 8.66 (d, J=1.5 Hz, 1H), 8.20 (d, J=9.1 Hz, 1H), 7.11 (d, J=9.1 Hz, 1H), 5.85 (m, 1H), 4.36 (m, 1H), 4.11 (m, 3H), 4.04 (m, 1H), 0.87 (s, 9H), 0.06 (d, J=8.8 Hz, 6H).

BM.iv. rac-2-azido-2-(3-fluoro-6-methoxy-[1,5]naphthyridin-4-yl)-ethanol

Starting from intermediate BM.iii (20.0 g) and using procedure J, the title intermediate was obtained as a yellowish solid (13.76 g; 99% yield).

¹H NMR (CDCl₃) δ: 8.69 (m, 1H), 8.23 (dd, J=9.1, 0.9 Hz, 1H), 7.13 (d, J=9.1 Hz, 1H), 5.92 (dd, J=7.9, 4.7 Hz, 1H), 4.29 (m, 1H), 4.11 (m, 3H), 4.06 (d, J=4.4 Hz, 1H), 1.25 (m, 1H).

BM.v. rac-4-azido-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from intermediate BM.iv (17.75 g) and using procedure H, the title intermediate was obtained as an orange solid (7.94 g; 51% yield).

¹H NMR (CDCl₃) δ: 8.45 (m, 1H), 7.88 (m, 1H), 6.84 (m, 1H), 5.66 (dd, J=8.5, 3.5 Hz, 1H), 4.62 (dd, J=13.8, 8.5 Hz, 1H), 4.35 (dd, J=13.8, 3.5 Hz, 1H).

BM.vi. (R)-4-amino-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

A solution of intermediate BM.v (7.93 g) in THF (140 mL) was stirred at 60° C. for 3 h in the presence of PPh₃ (9.90 g) and water (6.17 mL). The reaction mixture was concentrated to dryness and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4 to 1000:100:8) affording, after stirring in TBME, (RS)-4-amino-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one (6.37 g; 91% yield). This racemic material (6.22 g) was separated by preparative chiral HPLC using a 5 μm (R,R)-Whelk-01 column (50×250 mm) eluting with 4:1 MeCN-EtOH containing 0.1% of diethylamine, with t_(R)=5.21 min for the title compound (compound of Preparation BM) and t_(R)=6.13 min for the optical antipode (compound of Preparation BN). The recovery was 3.00 g (first eluting enantiomer, compound of Preparation BM, 100% ee) and 2.92 g (second eluting enantiomer, compound of Preparation BN, 100% ee).

The absolute configuration of the title molecule was determined by X-ray analysis of the corresponding carboxamide obtained from (S)-mandelic acid.

MS (ESI, m/z): 206.1 [M+H⁺]

Preparation BN: (S)-4-amino-3-fluoro-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

The title compound was obtained as the second eluting enantiomer (t_(R)=6.13 min) at Preparation BM, step BM.vi.

MS (ESI, m/z): 206.1 [M+H⁺].

Preparation BO: rac-1-amino-9-methyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BO.i. (7-bromo-2-methoxy-quinolin-8-yl)-methanol

A suspension of 7-bromo-8-bromomethyl-2-methoxyquinoline (35.2 g; prepared according to WO 2007/081597) and NaHCO₃ (14.63 g) in acetone (430 mL) and water (430 mL) was refluxed for 6 h. The org. solvent was removed under reduced pressure and the aq. layer was extracted twice with EA. The combined org. layers were sequentially washed with water and brine and dried over Na₂SO₄. The solvent was removed under reduced pressure and the residue was crystallized from TBDME, affording an off-white solid (16.01 g; 56% yield).

MS (ESI, m/z): 268.0 [M+H⁺].

BO.ii. 7-bromo-2-methoxy-quinoline-8-carbaldehyde

A solution of oxalyl chloride (5.68 mL) in DCM (265 mL) was cooled to −78° C. and treated dropwise with a solution of DMSO (5.71 mL) in DCM (50 mL). The resulting solution was treated with a solution of intermediate BO.i (6.00 g) in DCM (50 mL). After stirring for 1 h at −78° C., the reaction mixture was treated with TEA (23.4 mL) in DCM (50 mL) and gradually allowed to reach rt. The reaction mixture was treated with sat. aq. NaHCO₃ (300 mL) and the org. layer was separated and dried over Na₂SO₄. The solvent was evaporated under reduced pressure and the crude material was stirred in TBME, affording a yellow solid (4.68 g; 79% yield; contaminated by traces of starting material).

MS (ESI, m/z): 266.0 [M+H⁺].

BO.iii. 7-bromo-2-methoxy-8-vinyl-quinoline

Starting from intermediate BO.ii (500 mg) and methyltriphenylphosphonium bromide (1.01 g) and proceeding in analogy to Preparation Z, step Z.i, the title compound was obtained a colourless solid (411 mg; 83% yield).

MS (ESI, m/z): 264.3 [M+H⁺].

BO.iv. rac-1-(7-bromo-2-methoxy-quinolin-8-yl)-ethane-1,2-diol

Starting from intermediate BO.iii (5.50 g) and proceeding in analogy to Preparation AX, step AX.ii, using however K₂OsO₄/NMO instead of AD-mix β and omitting the use of methylsulfonamide, the title compound was obtained as a beige solid (5.75 g; 93% yield).

¹H NMR (CDCl3) δ: 8.01 (d, J=9.1 Hz, 1H), 7.58 (m, 1H), 7.50 (m, 1H), 6.97 (m, 1H), 5.53 (m, 1H), 4.07 (m, 3H), 3.91 (m, 2H).

BO.v. rac-1-(7-bromo-2-methoxy-quinolin-8-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethanol

Starting from intermediate BO.iv (5.71 g) and using procedure M, the title compound was obtained as a brown oil (7.79 g; 99% yield).

¹H NMR (CDCl₃) δ: 7.97 (d, J=8.8 Hz, 1H), 7.55 (m, 1H), 7.45 (m, 1H), 6.93 (d, J=8.8 Hz, 1H), 5.54 (t, J=5.6 Hz, 1H), 4.12 (m, 1H), 4.04 (s, 3H), 3.98 (m, 1H), 0.75 (m, 9H), −0.14 (d, J=0.9 Hz, 6H).

BO.vi. rac-8-[1-azido-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-7-bromo-2-methoxy-quinoline

Starting from intermediate BO.v (7.75 g) and using Procedure N, the title intermediate was obtained as a yellow oil (8.47 g; 100% yield).

MS (ESI, m/z): 437.2 [M+H⁺].

BO.vii. rac-1-(7-bromo-2-methoxy-quinolin-8-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethylamine

Starting from intermediate BO.vi. (8.45 g) and proceeding in analogy to Preparation BM, step BM.vi, the title intermediate was obtained as a yellow oil (2.60 g; 33% yield).

MS (ESI, m/z): 411.3 [M+H⁺].

BO.viii. rac-[1-(7-bromo-2-methoxy-quinolin-8-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate BO.vii (2.60 g) and using procedure G, the title intermediate was obtained as a yellow oil (3.20 g; 99% yield).

¹H NMR (CDCl₃) δ: 7.95 (d, J=9.1 Hz, 1H), 7.55 (m, 1H), 7.44 (m, 1H), 6.92 (d, J=9.1 Hz, 1H), 6.35 (m, 1H), 4.97 (m, 1H), 4.06 (m, 3H), 4.03 (m, 1H), 3.74 (m, 1H), 1.25 (m, 9H), 0.75 (s, 9H), −0.11 (s, 6H).

BO.ix. rac-[1-(7-bromo-2-methoxy-quinolin-8-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

Starting from intermediate BO.viii (3.20 g) and using procedure J, the title intermediate was obtained as an off-white solid (1.70 g; 68% yield).

MS (ESI, m/z): 396.9 [M+H⁺].

BO.x. rac-(9-bromo-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BO.ix (400 mg) and using procedure H, the title intermediate was obtained as a yellow solid (372 mg; 100% yield).

MS (ESI, m/z): 365.3 [M+H⁺].

BO.xi. rac-(9-methyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A solution of intermediate BO.x (90 mg) in DME (1.5 mL) was treated with tetrakis-(triphenylphosphine)palladium and the solution was purged with N₂. The solution was treated with K₂CO₃ (34 mg), water (0.5 mL) and trimethylboroxine (25 mg) and further stirred at 80° C. overnight. The reaction mixture was diluted with water and extracted with EA. The org. layer was sequentially washed with water, brine and dried over MgSO₄. The solvent was removed under reduced pressure and the residue was purified by CC (EA), affording a colourless solid (82 mg; 100% yield).

MS (ESI, m/z): 301.2 [M+H⁺].

BO.xii. rac-1-amino-9-methyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BO.xi. (81 mg) and using procedure B, the title compound was obtained as a grey solid (34 mg; 79% yield).

MS (ESI, m/z): 201.5 [M+H⁺].

Preparation BP: rac-4-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butyraldehyde BP.i. rac-6-[6-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-hexylamino]-4H-benzo[1,4]thiazin-3-one

A solution of 2-[4-[(tert-butyl)dimethylsiloxy]butyl]oxirane (10.0 g) and 6-amino-4H-benzo[1,4]thiazin-3-one (7.81 g; commercial) in EtOH/water (300 mL; 9:1) was refluxed for 2 days. The solvents were removed under reduced pressure and the residue was taken up in EA/Hex (1:1; 100 mL) and filtered. The filtrate was concentrated under reduced pressure and purified by CC (EA/Hex; 1:1), affording an orange solid (7.40 g; 42% yield).

MS (ESI, m/z): 411.3 [M+H⁺]

BP.ii. rac-6-{5-[4-(tert-Butyl-dimethyl-silanyloxy)-butyl]-2-oxo-oxazolidin-3-yl}-4H-benzo[1,4]thiazin-3-one

Starting from intermediate BP.i (7.30 g) and using procedure I, the title intermediate was obtained as a colourless solid (4.40 g; 79% yield).

MS (ESI, m/z): 437.4 [M+H⁺].

BP.iii. rac-6-[5-(4-hydroxy-butyl)-2-oxo-oxazolidin-3-yl]-4H-benzo[1,4]thiazin-3-one

Starting from intermediate BP.ii (4.40 g) and using procedure J, the title intermediate was obtained as a colourless solid (3.00 g; 92% yield).

MS (ESI, m/z): 323.4 [M+H⁺].

BP.iv. rac-4-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butyraldehyde

Starting from intermediate BP.iii (3.0 g) and using the procedure of Preparation U, step U.iv, the title intermediate was obtained as a colourless solid (2.30 g; 77% yield).

MS (ESI, m/z): 321.3 [M+H⁺].

Preparation BQ: rac-(1R*,2R*)-1-amino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester BQ.i. (E)-3-(2-methoxy-quinolin-8-yl)-acrylic acid methyl ester

A solution of 8-bromo-2-methyloxyquinoline (10.0 g), Pd(OAc)₂ (311 mg), P(o-Tol)₃ (1.28 g) in DMF (100 mL) was treated with TEA (17.6 mL) and methyl acrylate (18.93 mL). The solution was purged 3 times with nitrogen and stirred at 120° C. for 1 h. The reaction mixture was diluted with water (200 mL) and extracted with ether/EA. The org. layer was washed with water (3×200 mL) and brine and dried over MgSO₄. The solvent was removed under reduced pressure and the residue was purified by CC (Hept/EA 4:1), affording a pale yellow solid (9.34 g; 91% yield).

¹H NMR (CDCl₃) δ: 8.00 (d, J=9.1 Hz, 1H), 7.66 (dd, J=7.9, 1.5 Hz, 1H), 7.57 (d, J=6.7 Hz, 1H), 7.36 (m, 1H), 6.92 (d, J=8.8 Hz, 1H), 6.24-6.05 (m, 2H), 4.84 (m, 1H), 4.10 (s, 3H), 3.89 (d, J=5.0 Hz, 1H), 3.78 (s, 3H), 1.43 (m, 9H).

BQ.ii. (2S*,3R*)-3-tert-butoxycarbonylamino-2-hydroxy-3-(2-methoxy-quinolin-8-yl)-propionic acid methyl ester

A solution of tert-butyl carbamate (7.06 g) in n-propanol (120 mL) was sequentially treated with 0.4M NaOH (218 mL) and tert-butyl hypochlorite (10.6 mL; freshly prepared as described in Org. Lett. (2003), 5(12), 2123-2126 (S-2)). The reaction mixture was treated with a solution of (DHQD)₂PHAL (565 mg) and (DHQ)₂PHAL (565 mg) in n-propanol (100 mL) and after 5 min cooled to 10° C. and sequentially treated with a suspension of intermediate BQ.i. (7.07 g) in water/n-propanol (1:1; 140 mL) and potassium osmate(VI) dihydrate (428 mg). After stirring at +10° C. for 20 min the reaction mixture was treated with Na₂SO₃ (15 g) and further stirred at rt for 10 min. The reaction mixture was extracted with EA and the org. layer was sequentially washed with 5% aq. K₂CO₃, sat. aq. NaHCO₃ and brine. After drying over MgSO₄ and evaporation of the solvent, the residue was purified by CC (DCM/MeOH 10-1 containing 1% NH₄OH), affording a pale yellow foam (6.85 g; 63% yield).

MS (ESI, m/z): 377.6 [M+H⁺].

BQ.iii. rac-(1R*,2R*)-1-tert-butoxycarbonylamino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from intermediate BQ.ii (7.80 g) and using procedure H, the title intermediate was obtained as a colourless solid (6.24 g; 87% yield).

MS (ESI, m/z): 345.5 [M+H⁺].

BQ.iv. rac-(1R*,2R*)-1-amino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from intermediate BQ.iii. (1.00 g) and using procedure B, the title compound was obtained as a colourless solid (684 mg; 96% yield).

MS (ESI, m/z): 245.2 [M+H⁺].

Preparation BR: rac-(1R*,2R*)-1-amino-2-hydroxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BR.i. rac-((1R*,2R*)-2-hydroxymethyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BQ.iii (3.20 g) and using procedure A, the title intermediate was obtained as a colourless solid (2.67 g; 91% yield).

MS (ESI, m/z): 317.3 [M+H⁺].

BR.ii. rac-(1R*,2R*)-1-amino-2-hydroxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BR.i (600 mg) and using procedure B, the title compound was obtained as a colourless oil (400 mg; 98% yield).

MS (ESI, m/z): 217.3 [M+H⁺].

Preparation BS: rac-(1R*,2R*)-1-amino-2-methoxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BS.i. rac-((1R*,2R*)-2-methoxymethyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A solution of intermediate BR.i (400 mg) in THF (anhydrous; 4 mL) was treated at 0° C. with NaH (60% dispersion in oil; 51 mg). After a few min the reaction mixture was treated with MeI (83 μL) and further stirred at rt for 30 min. The reaction mixture was treated with sat. aq. NH₄Cl and extracted with EA. The org. layer was washed with water and brine and dried over MgSO₄. The solvent was evaporated under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4), affording a pale yellow solid (42 mg; 10% yield).

MS (ESI, m/z): 331.2 [M+H⁺].

BS.ii. rac-(1R*,2R*)-1-amino-2-methoxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BS.i (42 mg) and using procedure B, the title compound was obtained as a pale yellow oil (28 mg; 96% yield).

MS (ESI, m/z): 231.2 [M+H⁺].

Preparation BT: rac-(1R*,2S*)-1-amino-2-methyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BT.i. rac-((1R*,2S*)-2-methyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate BR.i (800 mg) and using procedure H, the intermediate mesylate was formed and further reacted after usual work up. It was dissolved in DME (45 mL) and refluxed in presence of NaI (1.21 g). After 1.5 h the reaction mixture was treated with Bu₃SnH (3 mL) and further refluxed for 3 h. The reaction mixture was diluted in ether and stirred in presence of 8% aq. KF for 16 h. The mixture was filtered. The two phases were separated and the aq. layer was extracted with EA. The combined org. layers were washed with water and brine and dried over MgSO₄. The solvents were removed under reduced pressure and the residue was purified by CC (Hept/EA 1:1), affording a colourless solid (476 mg; 63% yield).

MS (ESI, m/z): 301.3 [M+H⁺].

BT.ii. rac-(1R*,2S*)-1-amino-2-methyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BT.i (467 mg) and using procedure B, the title compound was obtained as a yellow oil (274 mg; 88% yield).

MS (ESI, m/z): 201.3 [M+H⁺].

Preparation BU: rac-(1R*,2R*)-1-amino-2-(1-hydroxy-1-methyl-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BU.i. rac-[(1R*,2R*)-2-(1-hydroxy-1-methyl-ethyl)-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl]-carbamic acid tert-butyl ester

A solution BQ.iii (422 mg) in THF (anhydrous; 8 mL) was treated dropwise at 0° C. with MeMgBr (1.4M in toluene/THF 3:1; 3.1 mL). After stirring 2 h at 0° C., the reaction mixture was allowed to reach rt and treated with MeMgBr (1.4M in toluene/THF 3:1; 5 mL). The reaction mixture was further stirred at rt overnight, quenched by the addition of sat. NH₄Cl solution and extracted with EA. The org. layer was sequentially washed with water and brine and dried over MgSO₄. The solvents were evaporated under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4), affording a pale yellow foam (74 mg; 17% yield).

MS (ESI, m/z): 345.5 [M+H⁺].

BU.ii. rac-(1R*,2R*)-1-amino-2-(1-hydroxy-1-methyl-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BU.i (74 mg) and using procedure B, the title compound was obtained as a brown oil (22 mg; 42% yield).

MS (ESI, m/z): 245.3 [M+H⁺].

Preparation BV: rac-1-amino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile BV.i. rac-(9-cyano-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A mixture of intermediate BE.ix (135 mg), Zn(CN)₂ (52 mg) and Pd(PPh₃)₄ (21 mg) in DMF (2 mL) was heated at 110° C. overnight under argon in a sealed flask. After cooling to rt, the reaction mixture was diluted with water and extracted with EA. The org. layer was washed with water and brine and dried over MgSO₄. The solvent was removed under reduced pressure and the residue was triturated in TBME, affording a pinkish solid (88 mg; 76% yield).

MS (ESI, m/z): 312.3 [M+H⁺].

BV.ii. rac-1-amino-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile

Starting from intermediate BV.i (88 mg) and using procedure B, the title compound was obtained as a colourless solid (57 mg, 95% yield).

MS (ESI, m/z): 212.1 [M+H⁺].

Preparation BW: methanesulfonic acid (R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl ester BW.i. 6-[(R)-5-(tert-butyl-dimethyl-silanyloxymethyl)-2-oxo-oxazolidin-3-yl]-4H-pyrido[3,2-b][1,4]thiazin-3-one

Starting from (5R)-5-[[[tert-butyldimethylsilyl]oxy]methyl]-2-oxazolidinone (1.20 g; prepared in according to Org. Letters (2005), 7, 1983-1985) and intermediate BK.ii (867 mg), the title compound was prepared in analogy to the preparation of intermediate BK.iii. After work-up and CC (Hept/EA 1:1), a beige solid (1.20 g; 70% yield) was obtained.

¹H NMR (CDCl₃) δ: 7.90 (d, J=8.5 Hz, 1H), 7.80 (s, 1H), 7.60 (d, J=8.5 Hz, 1H), 4.67 (m, 1H), 4.11 (m, 2H), 3.90 (m, 1H), 3.78 (m, 1H), 3.48 (s, 2H), 0.84 (s, 9H), 0.07 (s, 6H).

BW.ii. 6-((R)-5-hydroxymethyl-2-oxo-oxazolidin-3-yl)-4H-pyrido[3,2-b][1,4]thiazin-3-one

Starting from intermediate BW.i (1.20 g) and using procedure J, the title compound was obtained as a beige solid (880 mg; 100% yield).

MS (ESI, m/z):282.3 [M+H⁺].

BW.iii. Methanesulfonic acid (R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl ester

Starting from intermediate BW.ii (850 mg) and using procedure H, the title compound was obtained as a beige solid (850 mg; 78% yield).

¹H NMR (DMSO-d₆) δ: 10.88 (s, 1H), 7.79 (m, 1H), 7.66 (m, 1H), 5.00 (m, 1H), 4.50 (m, 2H), 4.21 (m, 1H), 3.86 (dd, J=10.5, 6.2 Hz, 1H), 3.51 (s, 2H), 3.23 (s, 3H).

Preparation BX: methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester BX.i. (S)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-oxazolidin-2-one

Starting from 2-[2-[[(tert-butyl)dimethylsilyl]oxy]ethyl]-oxirane, (7.00 g; prepared according to WO 2007/144423), carbamic acid ethyl ester (1.46 g), 4-nitrobenzoic acid (347 mg), (R,R)-(salen)Co^(II) complex (626 mg) and NaH (1.676 g) and proceeding in analogy to Org. Letters (2005), 7, 1983-1985, the title compound was obtained as a dark orange solid (880 mg; 11% yield).

¹H NMR (DMSO-d₆) δ: 7.39 (s, 1H), 4.59 (m, 1H), 3.67 (m, 2H), 3.53 (m, 1H), 3.13 (m, 1H), 1.79 (m, 2H), 0.85 (s, 9H), 0.02 (s, 6H).

BX.ii. 6-{(S)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-oxazolidin-3-yl}-4H-pyrido[3,2-b][1,4]thiazin-3-one

Starting from intermediate BX.i (880 mg) and intermediate BK.ii (720 mg), the title compound was prepared in analogy to the preparation of intermediate BK.iii. After work-up and CC (Hept/EA 1:1), a beige solid (1.00 g; 68% yield) was obtained.

MS (ESI, m/z): 410.4 [M+H⁺].

BX.iii. 6-[(S)-5-(2-hydroxy-ethyl)-2-oxo-oxazolidin-3-yl]-4H-pyrido[3,2-b][1,4]thiazin-3-one

Starting from intermediate BX.ii (1.00 g) and using procedure J, the title compound was obtained as a colourless solid (640 mg; 89% yield).

MS (ESI, m/z): 296.4.3 [M+H⁺].

BX.iv. Methanesulfonic acid 2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

Starting from intermediate BX.iii (600 mg) and using procedure H, the title compound was obtained as a beige solid (649 mg; 81% yield).

MS (ESI, m/z): 374.4 [M+H⁺].

Preparation BY: rac-1-amino-9-chloro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BY.i. rac-(9-chloro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A suspension of intermediate BE.ix (140 mg), CuCl (152 mg) and pyridine (0.5 mL) in dry DMSO was heated at 120° C. for 1 h. After cooling to rt, the mixture was partitioned between 1M HCl and EA. The aq. layer was extracted with EA and the combined org. layers were sequentially washed with water, NH₄Cl, NaHCO₃, dried over MgSO₄ and concentrated under reduced pressure. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4), affording a pale orange solid (104 mg; 85% yield).

MS (ESI, m/z): 321.5 [M+H⁺].

BY.ii. rac-1-amino-9-chloro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BY.i (90 mg) and using procedure B, the title compound was obtained as an off-white solid (55 mg, 89% yield).

MS (ESI, m/z): 221.1 [M+H⁺].

Preparation BZ: rac-1-amino-9-ethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one BZ.i. rac-(4-oxo-9-trimethylsilanylethynyl-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

PdCl₂(PPh₃)₂ (23 mg) and CuI (7.8 mg) were added to a suspension of intermediate BE.ix (300 mg) in TEA-dioxane (3 mL; 4:1). The reaction mixture was heated to 70° C. and ethynyl-trimethyl-silane (0.14 mL) was added in one portion and the reaction mixture was further heated in a sealed glass vial at 100° C. for 2 days. After cooling to rt, the mixture was partitioned between 1M HCl and DCM. The org. layer was sequentially washed with water, NH₄Cl, and NaHCO₃, dried over MgSO₄ and concentrated under reduced pressure. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:50.4), affording a beige solid (132 mg; 42% yield).

MS (ESI, m/z): 383.4 [M+H⁺].

BZ.ii. rac-(9-ethynyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A solution of intermediate BZ.i (115 mg) in THF (2 mL) was treated with TBAF (1M in THF; 0.33 mL) at rt. After 15 min, the mixture was concentrated, water was added and the mixture was extracted with DCM. The org. layer was dried over MgSO₄, filtered and concentrated. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4), affording a yellow solid (82 mg; 88% yield).

MS (ESI, m/z): 311.6 [M+H⁺].

BZ.iii. rac-(9-ethyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

A solution of intermediate BZ.ii (40 mg) in MeOH (1 mL) was hydrogenated over Pd/C for 2 h. The suspension was filtered using a glass fiber filter. The filter cake was washed with DCM/MeOH and the filtrate was concentrated under reduced pressure, affording a pale yellow solid (37 mg; 91% yield).

MS (ESI, m/z): 315.3 [M+H⁺].

BZ.iv. rac-1-amino-9-ethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BZ.iii. (30 mg) and using procedure B, the title compound was obtained as a colourless solid (13 mg, 64% yield).

MS (ESI, m/z): 215.5 [M+H⁺].

Preparation CA: rac-1-amino-9-ethynyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate BZ.ii (40 mg) and using procedure B, the title compound was obtained as a beige solid (20 mg, 74% yield).

MS (ESI, m/z): 211.3 [M+H⁺].

Preparation CB: rac-(1R*,2R*)-1-amino-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ii]quinoline-2-carboxylic acid methyl ester CB.i. (2S*3R*)-3-tert-butoxycarbonylamino-2-hydroxy-3-(7-fluoro-2-methoxy-quinolin-8-yl)-propionic acid methyl ester

Starting from (E)-3-(7-fluoro-2-methoxy-quinolin-8-yl)-acrylic acid methyl ester (7.07 g; prepared in analogy to the corresponding n-butyl ester described in WO 2008/128953) and proceeding in analogy to the preparation of intermediate BQ.ii, the title compound was obtained as a light yellow semi-solid material (7.621 g; 84% yield).

MS (ESI, m/z): 395.4 [M+H⁺].

CB.ii. rac-(1R*,2R*)-1-tert-butoxycarbonylamino-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from intermediate CB.i (4.60 g) and using procedure H, the title intermediate was obtained as a beige solid (81 mg; 19% yield).

MS (ESI, m/z): 363.4 [M+H⁺].

CB.iii. rac-(1R*,2R*)-1-amino-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from intermediate CB.ii. (100 mg) and using procedure B, the title compound was obtained as a colourless solid (58 mg; 80% yield).

¹H NMR (CDCl₃) δ: 7.71 (dd, J=9.4, 0.9 Hz, 1H), 7.49 (m, 1H), 6.92 (m, 1H), 6.63 (d, J=9.4 Hz, 1H), 5.02 (m, 2H), 3.83 (d, J=1.2 Hz, 3H).

Preparation CC: rac-(1R*,2R*)-1-amino-9-fluoro-2-hydroxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one CC.i. rac-((1R*,2R*)-9-fluoro-2-hydroxymethyl-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate CB.ii (200 mg) and using procedure A, the title intermediate was obtained as a colourless solid (112 mg; 61% yield).

MS (ESI, m/z): 335.4 [M+H⁺].

CC.ii. rac-(1R*,2R*)-1-amino-9-fluoro-2-hydroxymethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate CC.i (104 mg) and using procedure B, the title compound was obtained as a colourless solid (60 mg; 82% yield).

MS (ESI, m/z): 235.1 [M+H⁺].

Preparation CD: rac-(1R*,2S*)-1-amino-9-fluoro-2-methyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one CD.i. rac-((1R*,2S*)-9-fluoro-2-methyl-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-carbamic acid tert-butyl ester

Starting from intermediate CC.i (495 mg) and using procedure H, the intermediate mesylate was formed and further reacted after usual work-up. It was dissolved in DME (25 mL) and refluxed in presence of Nat (710 mg). After 1.5 h, the reaction mixture was treated with Bu₃SnH (0.96 mL) and further refluxed for 3 h. The reaction mixture was diluted in ether and stirred in presence of 8% aq. KF for 16 h. The mixture was filtered. The two phases were separated and the aq. layer was extracted with EA. The combined org. layers were washed with water and brine and dried over MgSO₄. The solvents were removed under reduced pressure and the residue was purified by CC (Hept/EA 1:1 to 0:1), affording a colourless solid (374 mg; 79% yield).

MS (ESI, m/z): 319.3 [M+H⁺].

CD.ii. rac-(1R*,2S*)-1-amino-9-fluoro-2-methyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate CD.i (370 mg) and using procedure B, the title compound was obtained as a colourless solid (198 mg; 78% yield).

MS (ESI, m/z): 218.9 [M+H⁺].

Preparation CE: rac-(1R*,2R*)-methanesulfonic acid 1-amino-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-2-ylmethyl ester CE.i. rac-(1R*,2R*)-methanesulfonic acid 1-tert-butoxycarbonylamino-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-2-ylmethyl ester

Starting from intermediate CC.i (200 mg) and using procedure H, the title compound was obtained as a yellow foam (285 mg; 100% yield).

MS (ESI, m/z): 413.3 [M+H⁺].

CE.ii. rac-(1R*,2R*)-methanesulfonic acid 1-amino-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-2-ylmethyl ester

Starting from intermediate CE.i (280 mg) and using procedure B, the title compound was obtained as a beige foam (140 mg; 77% yield).

MS (ESI, m/z): 313.5 [M+H⁺].

Preparation CF: (S)-1-amino-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Intermediate C was separated by chiral prep. HPLC (Column: Daicel, ChiralPak IA, 20×250 mm; eluent: 5% EtOH in MeCN+0.1% DEA; flow: 16.00 mL/min). The title compound was obtained as the first eluting compound (t_(R)=7.36 min). The absolute stereochemistry was assigned based on the NMR of the corresponding Mosher amide.

MS (ESI, m/z): 205.2 [M+H⁺].

Preparation CG: (R)-1-amino-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Intermediate C was separated by chiral prep. HPLC (Column: Daicel, ChiralPak IA, 20×250 mm; eluent: 5% EtOH in MeCN+0.1% DEA; flow: 16.00 mL/min). The title compound was obtained as the second eluting compound (t_(R)=8.94 min). The absolute stereochemistry was assigned based on the NMR of the corresponding Mosher amide.

MS (ESI, m/z): 205.2 [M+H⁺].

Preparation CH: methanesulfonic acid 2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl ester

This intermediate was prepared in analogy to Preparation BX, steps BX.i to BX.iii, using however the (S,S)-(salen)Co^(II) complex.

The analytical data were identical with those of the compound of Preparation BX.

Preparation CI: (RS)-6-amino-7-fluoro-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

The title compound was prepared as described in Preparation AD, using however NMO and K₂OsO₄ as dihydroxylating agent (Cha, J. K., Chem. Rev. (1995), 95, 1761-1795) in the first step.

The analytical data were identical with those of the compound of Preparation AD.

Example 1 (1RS)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and H and using procedure C, the title compound was obtained as a pale yellow solid (39 mg; 18% yield).

¹H NMR (DMSO-d₆) δ: 10.71 (s, 1H), 7.89 (d, J=9.4 Hz, 1H), 7.58 (m, 1H), 7.32 (m, 1H), 6.94 (m, 3H), 6.50 (d, J=9.4 Hz, 1H), 4.67 (m, 1H), 4.53 (s, 2H), 4.36 (m, 2H), 4.00 (m, 2H), 3.67 (m, 1H), 3.02 (m, 1H), 2.74 (m, 3H), 2.04 (m, 1H), 1.81 (m, 2H).

MS (ESI, m/z): 479.3 [M+H⁺].

Example 2 (1RS)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and I and using procedure C, the title compound was obtained as a pale yellow solid (35 mg; 16% yield).

¹H NMR (DMSO-d₆) δ: 10.71 (s, 1H), 7.88 (d, J=9.4 Hz, 1H), 7.59 (dd, J=8.8, 4.7 Hz, 1H), 7.32 (m, 1H), 6.96 (m, 3H), 6.50 (d, J=9.4 Hz, 1H), 4.68 (m, 1H), 4.53 (s, 2H), 4.32 (m, 2H), 4.00 (m, 2H), 3.65 (m, 1H), 3.02 (m, 1H), 2.74 (m, 3H), 2.04 (m, 1H), 1.83 (m, 2H).

MS (ESI, m/z): 479.3 [M+H⁺].

Example 3 (1RS)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and J and using procedure C, the title compound was obtained as an off-white solid (34 mg; 15% yield).

¹H NMR (DMSO-d₆) δ: 10.56 (s, 1H), 7.88 (d, J=9.4 Hz, 1H), 7.59 (m, 1H), 7.32 (m, 2H), 7.01 (m, 2H), 6.50 (dd, J=9.7, 0.9 Hz, 1H), 4.69 (m, 1H), 4.32 (m, 2H), 4.02 (m, 2H), 3.66 (m, 1H), 3.43 (s, 2H), 3.02 (m, 1H), 2.74 (m, 3H), 1.90 (m, 3H).

MS (ESI, m/z): 495.3 [M+H⁺].

Example 4 (1RS)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and K and using procedure D, the title compound was obtained as an off-white solid (79 mg; 35% yield).

¹H NMR (DMSO-d₆) δ: 10.55 (s, 1H), 7.88 (d, J=9.7 Hz, 1H), 7.57 (m, 1H), 7.32 (m, 2H), 7.01 (m, 2H), 6.50 (dd, J=9.4, 0.6 Hz, 1H), 4.69 (m, 1H), 4.34 (m, 2H), 4.03 (m, 2H), 3.66 (m, 1H), 3.42 (s, 2H), 3.02 (s, 1H), 2.72 (m, 3H), 1.99 (m, 1H), 1.84 (m, 2H).

MS (ESI, m/z): 495.3 [M+H⁺].

Example 5 (1RS)-9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and N and using procedure D, the title compound was obtained as a yellow solid (31 mg; 37% yield).

MS (ESI, m/z): 481.1 [M+H⁺].

Example 6 (1RS)-9-fluoro-1-({2-[(RS)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and S and using procedure C, the title compound was obtained as a yellow solid (94 mg; 47% yield).

MS (ESI, m/z): 440.5 [M+H⁺].

Example 7 (1RS)-1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations B and P and using procedure D, the title compound was obtained as a pale yellow solid (45 mg; 28% yield).

MS (ESI, m/z): 466.2 [M+H⁺].

Example 8 (1RS)-9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations B and O and using procedure D, the title compound was obtained as a yellow solid (50 mg; 29% yield).

MS (ESI, m/z): 495.1 [M+H⁺].

Example 9 (1RS)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations B and Q and using procedure C, the title compound was obtained as a pale yellow solid (47 mg; 20% yield).

MS (ESI, m/z): 479.2 [M+H⁺].

Example 10 (1RS)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations B and N and using procedure D, the title compound was obtained as a pale yellow solid (38 mg; 16% yield).

MS (ESI, m/z): 494.9 [M+H⁺].

Example 11 (1RS)-9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations B and R and using procedure D, the title compound was obtained as a yellow solid (29 mg; 19% yield).

MS (ESI, m/z): 440.5 [M+H⁺].

Example 12 (1RS)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and T and using procedure E, the title compound was obtained as a colourless solid (42 mg; 45% yield).

¹H NMR (CDCl₃) δ: 7.70 (d, J=9.4 Hz, 1H), 7.47 (m, 1H), 7.32 (m, 1H), 6.92 (m, 2H), 6.76 (m, 1H), 6.62 (d, J=9.4 Hz, 1H), 4.96 (m, 1H), 4.64 (m, 1H), 4.50 (m, 3H), 4.26 (m, 1H), 4.04 (m, 1H), 3.60 (m, 1H), 3.42 (m, 2H), 2.73 (m, 2H), 1.76 (m, 4H).

MS (ESI, m/z): 479.2 [M+H⁺].

Example 13 (1RS)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and U and using procedure E, the title compound was obtained as a pale beige solid (48 mg; 50% yield).

¹H NMR (CDCl₃) δ: 7.69 (d, J=9.7 Hz, 1H), 7.47 (dd, J=8.5, 4.7 Hz, 1H), 7.35 (d, J=2.3 Hz, 1H), 7.24 (m, 2H), 6.91 (m, 2H), 6.61 (d, J=9.4 Hz, 1H), 4.95 (dd, J=8.2, 3.2 Hz, 1H), 4.65 (m, 1H), 4.49 (dd, J=13.5, 8.2 Hz, 1H), 4.26 (dd, J=13.2, 3.5 Hz, 1H), 4.06 (m, 1H), 3.60 (m, 1H), 3.36 (s, 2H), 2.73 (m, 2H), 1.77 (m, 5H).

MS (ESI, m/z): 495.0 [M+H⁺].

Example 14 (1RS)-9-fluoro-1-{2-[(RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and M and using procedure C, the title compound was isolated as a pale yellow solid (13 mg; 12% yield).

¹H NMR (CDCl₃) δ: 8.76 (m, 1H), 7.66 (d, J=9.4 Hz, 1H), 7.44 (m, 2H), 7.24 (m, 1H), 6.91 (m, 2H), 6.61 (d, J=9.7 Hz, 1H), 4.96 (m, 1H), 4.80 (m, 1H), 4.50 (m, 1H), 4.28 (m, 1H), 4.08 (m, 1H), 3.68 (m, 1H), 3.38 (s, 2H), 2.94 (m, 2H), 1.97 (m, 3H).

MS (ESI, m/z): 481.1 [M+H⁺].

Example 15 (4R)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations V and J and using procedure C, the title compound was obtained as a colourless solid (9 mg; 12% yield).

MS (ESI, m/z): 478.0 [M+H⁺].

Example 16 (4RS)-3-fluoro-4-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations F and O and using procedure D, the title compound was obtained as a yellow solid (6 mg; 7% yield).

MS (ESI, m/z): 496.3 [M+H⁺].

Example 17 (4RS)-3-fluoro-4-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations F and N and using procedure D, the title compound was obtained as a yellow solid (8 mg; 9% yield).

MS (ESI, m/z): 496.4 [M+H⁺].

Example 18 (4R)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the dihydrochloride salt of the compound of Preparation D (112 mg) and the compound of Preparation U (153 mg) and using procedure E, the title compound was obtained as an orange solid (27 mg; 11% yield).

MS (ESI, m/z): 478.1 [M+H⁺].

Example 19 (4R)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the dihydrochloride salt of the compound of Preparation D (78 mg) and the compound of Preparation T (101 mg) and using procedure E, the title compound was obtained as an orange solid (17 mg; 11% yield).

MS (ESI, m/z): 462.1 [M+H⁺].

Example 20 (6RS)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations G (93 mg) and U (153 mg) and using procedure E, the title compound was obtained as a yellow solid (210 mg; 88% yield).

MS (ESI, m/z): 478.0 [M+H⁺].

Example 21 (6RS)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations G and T and using procedure E, the title compound was obtained as a yellow solid (276 mg; 70% yield).

MS (ESI, m/z): 462.1 [M+H⁺].

Example 22 (1RS)-9-fluoro-1-(2-{[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

The compound of Example 8 was hydrogenated according to procedure F, affording a colourless solid (10 mg; 23% yield).

MS (ESI, m/z): 497.3 [M+H⁺].

Example 23 (1RS)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one 23.i. rac-(9-fluoro-4-oxo-1,2,5,6-tetrahydro-4H-pyrrolo[3,2,1-ij]quinolin-1-ylmethyl)-carbamic acid tert-butyl ester

A solution of intermediate A.vii of Preparation A (47 mg, 0.15 mmol) in MeOH (5 mL) was hydrogenated over 10% Pd/C (31 mg) for 2 h. The catalyst was filtered off and washed with MeOH. The filtrate was concentrated to afford the title intermediate as a colourless solid (48 mg; 100% yield).

MS (ESI, m/z): 321.3 [M+H⁺].

23.ii. rac-1-aminomethyl-9-fluoro-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 23.i and using procedure B, the title intermediate was obtained as a yellow solid (29 mg; 88% yield).

MS (ESI, m/z): 221.2 [M+H⁺].

23.iii. (1RS)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 23.ii and the compound of Preparation L and using procedure D, the title compound was obtained as a pale brown solid (8 mg; 14% yield).

MS (ESI, m/z): 497.4 [M+H⁺].

Example 24 (1RS)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

The compound of Example 10 was hydrogenated using procedure F, affording the title compound as an off-white solid (8 mg; 16% yield).

MS (ESI, m/z): 497.2 [M+H⁺].

Example 25 (1RS)-9-fluoro-1-(2-{[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

The compound of Example 9 was hydrogenated using procedure F, affording the title compound as a colourless solid (12 mg; 32% yield).

MS (ESI, m/z): 481.2 [M+H⁺].

Example 26 (1RS)-1-(2-{[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

The compound of Example 7 was hydrogenated using procedure F, affording the title compound as an off-white solid (21 mg; 52% yield).

MS (ESI, m/z): 468.2 [M+H⁺].

Example 27 (1RS)-9-fluoro-1-(2-{[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

The compound of Example 11 was hydrogenated using procedure F, affording the title compound as an off-white solid (17 mg; 74% yield).

MS (ESI, m/z): 442.2 [M+H⁺].

Example 28 (4RS)-3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and L and using procedure D, the title compound was obtained as a yellow solid (7 mg; 18% yield).

MS (ESI, m/z): 496.2 [M+H⁺].

Example 29 (1RS)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

The compound of Example 4 was hydrogenated using procedure F, affording the title compound as a colourless solid (17 mg; 39% yield).

MS (ESI, m/z): 497.2 [M+H⁺].

Example 30 (1RS)-9-fluoro-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and O and using procedure D, the title compound was obtained as a yellow solid (49 mg; 37% yield).

MS (ESI, m/z): 481.2 [M+H⁺].

Example 31 (1RS)-1-({[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and P and using procedure D, the title compound was obtained as a yellow solid (33 mg; 27% yield).

MS (ESI, m/z): 452.2 [M+H⁺].

Example 32 (1RS)-9-fluoro-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and Q and using procedure C, the title compound was obtained as a yellow solid (35 mg; 27% yield).

MS (ESI, m/z): 465.2 [M+H⁺].

Example 33 (1RS)-9-fluoro-1-({[(R)-3-(3-fluoro-4-methyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and R and using procedure D, the title compound was obtained as a yellow solid (17 mg; 15% yield).

MS (ESI, m/z): 426.2 [M+H⁺].

Example 34 (RS)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compound of Preparations W and AF and using procedure C, the title compound was obtained as a beige solid (13 mg; 8% yield).

MS (ESI, m/z): 478.0 [M+H⁺].

Example 35 (RS)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations X and U and using procedure E, the title compound was obtained as a beige solid (30 mg; 24% yield).

MS (ESI, m/z): 476.9 [M+H⁺].

Example 36 (RS)-1-({[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Preparation A and (5S)-3-(4-ethoxyphenyl)-5-[[(methylsulfonyl)oxy]methyl]-2-oxazolidinone (prepared according to WO 2008/126034) and using procedure C, the title compound was obtained as a yellow solid (44 mg; 27% yield).

MS (ESI, m/z): 472.3 [M+H⁺].

Example 37 (RS)-9-fluoro-1-({[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AG and using procedure C, the title compound was obtained as a yellow solid (46 mg; 29% yield).

MS (ESI, m/z): 436.1 [M+H⁺].

Example 38 (RS)-1-({[(R)-3-(4-butyl-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-amino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AH and using procedure C, the title compound was obtained as a yellow solid (36 mg; 22% yield).

MS (ESI, m/z): 450.1 [M+H⁺].

Example 39 (S)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations Y and U and using procedure E, the title compound was obtained as a beige solid (90 mg; 23% yield).

MS (ESI, m/z): 477.9 [M+H⁺].

Example 40 (S)-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations Y and T and using procedure E, the title compound was obtained as a beige foam (55 mg; 15% yield).

MS (ESI, m/z): 461.9 [M+H⁺].

Example 41 (S)-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations Y and AI and using procedure C, the title compound was obtained as a yellow solid (10 mg; 2% yield).

MS (ESI, m/z): 464.1 [M+H⁺].

Example 42 (RS)-1-({2-[(RS)-3-(2,3-dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AJ and using procedure C, the title compound was obtained as a yellow solid (48 mg; 34% yield).

MS (ESI, m/z): 467.1 [M+H⁺].

Example 43 (RS)-1-({2-[(RS)-3-(2,3-dihydro-[1,4]dioxino[2,3-b]pyridin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AK and using procedure C, the title compound was obtained as a yellow foam (42 mg; 30% yield).

MS (ESI, m/z): 467.1 [M+H⁺].

Example 44 (RS)-1-({2-[(R)-3-(4-ethoxy-phenyl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AL and using procedure C, the title compound was obtained as a yellow foam (20 mg; 14% yield).

¹H NMR (CDCl₃) δ: 7.65 (dd, J=9.4, 1.5 Hz, 1H), 7.38 (m, 3H), 6.87 (m, 3H), 6.60 (d, J=9.7 Hz, 1H), 4.70 (m, 1H), 4.44 (m, 2H), 4.01 (m, 4H), 3.61 (td, J=9.1, 7.3 Hz, 1H), 3.14 (m, 1H), 2.90 (m, 3H), 1.92 (m, 2H), 1.39 (t, J=6.7 Hz, 3H).

MS (ESI, m/z): 452.1 [M+H⁺].

Example 45 (RS)-9-fluoro-1-({2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AM and using procedure C, the title compound was obtained as a yellow foam (24 mg; 17% yield).

¹H NMR (CDCl₃) δ: 7.65 (dd, J=9.7, 1.5 Hz, 1H), 7.39 (m, 3H), 7.16 (d, J=8.5 Hz, 2H), 6.87 (td, J=9.1, 1.8 Hz, 1H), 6.60 (d, J=9.4 Hz, 1H), 4.72 (m, 1H), 4.44 (m, 2H), 4.02 (m, 2H), 3.64 (m, 1H), 3.14 (m, 1H), 2.90 (m, 3H), 2.55 (m, 2H), 1.91 (m, 2H), 1.61 (m, 2H), 0.92 (t, J=7.3 Hz, 3H).

MS (ESI, m/z): 450.1 [M+H⁺].

Example 46 (RS)-1-({2-[(R)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AN and using procedure C, the title compound was obtained as an off-white solid (32 mg; 21% yield).

¹H NMR (CDCl₃) δ: 7.64 (dd, J=9.4, 1.2 Hz, 1H), 7.38 (dd, J=8.8, 4.7 Hz, 1H), 7.03 (t, J=2.3 Hz, 1H), 6.89 (m, 3H), 6.58 (d, J=9.4 Hz, 1H), 4.68 (m, 1H), 4.48 (m, 1H), 4.36 (m, 1H), 4.22 (m, 4H), 3.97 (m, 2H), 3.56 (m, 1H), 3.12 (m, 1H), 2.88 (m, 3H), 1.90 (m, 2H).

MS (ESI, m/z): 466.0 [M+H⁺].

Example 47 (RS)-9-fluoro-1-({2-[(RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AO and using procedure C, the intermediate (RS)-9-fluoro-1-[(2-{3-[(RS)-4-(4-methoxy-benzyl)-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl]-2-oxo-oxazolidin-5-yl}-ethylamino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one was obtained as a yellowish foam (148 mg, 36% yield). Said intermediate was further treated with TFA (4 mL) at reflux for 3 days. The solvent was removed under reduced pressure and the residue was partitioned between DCM and aq. NH₄OH. The org. phase was washed with water and brine and dried over MgSO₄. The residue was purified by CC (EA/MeOH 9:1 containing 1% NH₄OH), affording, after trituration in ether/MeOH, a beige solid (55 mg; 17% yield).

MS (ESI, m/z): 480.0 [M+H⁺].

Example 48 (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations Z and U and using procedure E, the title compound was obtained as a beige solid (135 mg; 53% yield).

¹H NMR (DMSO d6) δ: 10.54 (s, 1H), 8.17 (s, 1H), 7.70 (d, J=7.9 Hz, 1H), 7.60 (d, J=7.3 Hz, 1H), 7.31 (m, 3H), 7.06 (dd, J=8.5, 2.3 Hz, 1H), 4.70 (m, 2H), 4.44 (m, 1H), 4.07 (m, 2H), 3.62 (dd, J=8.8, 7.3 Hz, 1H), 3.41 (s, 2H), 2.63 (m, 2H), 1.76 (m, 2H), 1.53 (m, 2H).

Examples 49 and 50 (S)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (R)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AI and using procedure C, the title compounds were obtained as a light yellow solid (466 mg, 26%, mixture of diastereoisomers; MS (ESI, m/z): 495.1 [M+H⁺]). This mixture (75 mg) was separated on a chiral HPLC column (ChiralPak IA, 4.6×250 mm, 5 μm; eluents: MeCN and EtOH containing 0.1% of DEA) affording the corresponding diastereoisomers:

First eluting compound (27 mg): ¹H NMR (CDCl₃) δ: 7.69 (d, J=9.4 Hz, 1H), 7.41 (dd, J=8.5, 4.4 Hz, 1H), 7.23 (m, 1H), 7.12 (m, 2H), 6.89 (t, J=9.1 Hz, 1H), 6.62 (d, J=9.7 Hz, 1H), 4.71 (m, 1H), 4.45 (m, 2H), 4.03 (m, 2H), 3.62 (m, 2H), 3.34 (s, 2H), 2.95 (m, 3H), 2.00 (m, 1H), 1.78 (m, 1H).

Second eluting compound (20 mg): ¹H NMR (CDCl₃) δ: 7.69 (d, J=9.4 Hz, 1H), 7.41 (dd, J=8.8, 4.4 Hz, 1H), 7.22 (m, 2H), 7.08 (dd, J=8.5, 2.3 Hz, 1H), 6.89 (t, J=9.1 Hz, 1H), 6.60 (d, J=9.4 Hz, 1H), 4.62 (m, 1H), 4.48 (m, 1H), 4.35 (m, 1H), 3.96 (m, 2H), 3.71 (m, 1H), 3.34 (s, 2H), 3.10 (dd, J=12.0, 4.4 Hz, 1H), 2.88 (m, 3H), 1.91 (m, 2H).

Example 51 (RS)-9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and U and using procedure E, the title compound was obtained as a light yellow foam (69 mg; 59% yield).

MS (ESI, m/z): 509.2 [M+H⁺].

Example 52 (RS)-9-fluoro-1-({3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and T and using procedure E, the title compound was obtained as a light yellow foam (60 mg; 53% yield).

MS (ESI, m/z): 493.2 [M+H⁺].

Example 53 (RS)-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AB and AF and using procedure C, the title compound was obtained as a light yellow foam (10 mg; 8% yield).

MS (ESI, m/z): 476.9 [M+H⁺].

Example 54 (S)-6-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations Z and J and using procedure C, the title compound was obtained as an orange solid (30 mg, 14% yield).

MS (ESI, m/z): 464.1 [M+H⁺].

Example 55 (S)-6-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparation Z and intermediate K.iv and using procedure C, the title compound was obtained as an orange solid (50 mg; 20% yield).

MS (ESI, m/z): 464.3 [M+H⁺].

Example 56 (RS)-6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AC and AI and using procedure C, the title compound was obtained as a yellow foam (98 mg; 28% yield).

MS (ESI, m/z): 477.9 [M+H⁺].

Example 57 (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AD and T and using procedure E, the title compound was obtained as a colourless solid (70 mg; 29% yield).

MS (ESI, m/z): 480.1 [M+H⁺].

Example 58 (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AD and U and using procedure E, the title compound was obtained as a colourless solid (85 mg; 34% yield).

MS (ESI, m/z): 469.1 [M+H⁺].

Example 59 (RS)-9-fluoro-1-{2-[(R)-2-oxo-3-(4-propyl-phenyl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and AM and using procedure C, the title compound was obtained as a yellow solid (46 mg; 31% yield).

¹H NMR (CDCl₃) δ: 7.68 (dd, J=9.4, 0.9 Hz, 1H), 7.45 (m, 3H), 7.17 (d, J=8.2 Hz, 2H), 6.92 (t, J=8.8 Hz, 1H), 6.61 (d, J=9.4 Hz, 1H), 4.99 (m, 1H), 4.78 (m, 1H), 4.52 (m, 1H), 4.31 (dd, J=13.2, 3.2 Hz, 1H), 4.10 (t, J=8.5 Hz, 1H), 3.69 (m, 1H), 2.95 (m, 2H), 2.56 (m, 2H), 2.02 (m, 2H), 1.62 (m, 2H), 0.92 (t, J=7.3 Hz, 3H).

MS (ESI, m/z): 436.2 [M+H⁺].

Example 60 (RS)-1-({2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-methyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and AQ and using procedure C, the title compound was obtained as a yellow foam (29 mg; 34% yield).

¹H NMR (CDCl₃) δ: 7.65 (dd, J=9.7, 0.9 Hz, 1H), 7.39 (dd, J=8.8, 4.7 Hz, 1H), 7.02 (t, J=2.1 Hz, 1H), 6.87 (m, 3H), 6.58 (d, J=9.4 Hz, 1H), 4.70 (m, 1H), 4.44 (m, 2H), 4.22 (m, 4H), 3.98 (m, 2H), 3.58 (m, 2H), 3.15 (m, 1H), 2.91 (m, 3H), 1.92 (m, 2H).

MS (ESI, m/z): 466.2 [M+H⁺].

Example 61 (RS)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and AI and using procedure C, the title compound was obtained as a beige solid (110 mg; 46% yield).

¹H NMR (DMSO d6) δ: 10.58 (s, 1H), 7.90 (d, J=9.7 Hz, 1H), 7.54 (m, 2H), 7.32 (m, 2H), 7.18 (t, J=7.9 Hz, 1H), 7.08 (m, 1H), 6.55 (d, J=9.7 Hz, 1H), 4.81 (m, 1H), 4.39 (m, 2H), 4.08 (m, 3H), 3.72 (m, 1H), 3.42 (s, 3H), 3.05 (m, 4H), 2.12 (m, 2H).

MS (ESI, m/z): 476.8 [M+H⁺].

Example 62 (RS)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and H and using procedure C, the title compound was obtained as a beige solid (90 mg; 39% yield).

MS (ESI, m/z): 460.9 [M+H⁺].

Example 63 (RS)-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and N and using procedure D, the title compound was obtained as a beige solid (44 mg; 19% yield).

MS (ESI, m/z): 462.9 [M+H⁺].

Example 64 (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AA and U and using procedure E, the title compound was obtained as an orange solid (100 mg; 42% yield).

MS (ESI, m/z): 477.8 [M+H⁺].

Example 65 (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AA and T and using procedure E, the title compound was obtained as an orange solid (140 mg; 61% yield).

MS (ESI, m/z): 461.9 [M+H⁺].

Example 66 (S)-7-fluoro-6-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compound of Example 58 and (tert-butyldimethylsilyloxy)-acetaldehyde and using procedure E, followed by treatment of the intermediate thus obtained with aq. TFA (50%; 2 mL), the title compound was obtained as a colourless foam (45 mg; 40% yield).

MS (ESI, m/z): 539.9 [M+H⁺].

Example 67 (S)-7-fluoro-6-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compound of Example 57 and (tert-butyldimethylsilyloxy)-acetaldehyde and using procedure E, followed by treatment of the intermediate thus obtained with aq. TFA (50%; 2 mL), the title compound was obtained as a colourless foam (80 mg; 45% yield).

MS (ESI, m/z): 523.9 [M+H⁺].

Example 68 (RS)-9-fluoro-1-(2-{(3-hydroxy-propyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 68.i. (RS)-1-(2-{[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Example 10 and 3-(tert-butyldimethylsilyloxy)-propionaldehyde and using procedure E, the title compound was obtained as a colourless solid (101 mg; 75% yield).

MS (ESI, m/z): 667.4 [M+H⁺].

68.ii. (RS)-9-fluoro-1-(2-{(3-hydroxy-propyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 68.i and using procedure J, the title compound was obtained as an off-white solid (70 mg; 87% yield).

MS (ESI, m/z): 553.2 [M+H⁺].

Example 69 (RS)-9-fluoro-1-(2-{(2-hydroxy-ethyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 69.i. (RS)-1-(2-{[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Example 10 and tert-butyldimethylsilyloxy-acetaldehyde and using procedure E, the title compound was obtained as a colourless solid (100 mg; 76% yield).

MS (ESI, m/z): 653.4 [M+H⁺].

69.ii. (RS)-9-fluoro-1-(2-{(2-hydroxy-ethyl)-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-ethyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 69.i and using procedure J, the title compound was obtained as an off-white solid (54 mg; 69% yield).

MS (ESI, m/z): 539.2 [M+H⁺].

Example 70 (RS)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and AR and using procedure E, the title compound was obtained as a colourless solid (175 mg; 73% yield).

MS (ESI, m/z): 480.0 [M+H⁺].

Example 71 (S)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AD and AR and using procedure E, the title compound was obtained as a colourless solid (87 mg; 36% yield).

MS (ESI, m/z): 481.1 [M+H⁺].

Example 72 (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and U and using procedure E, the title compound was obtained as a colourless solid (223 mg; 72% yield).

MS (ESI, m/z): 477.2 [M+H⁺].

Example 73 (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and T and using procedure E, the title compound was obtained as a colourless solid (259 mg; 87% yield).

MS (ESI, m/z): 461.2 [M+H⁺].

Example 74 (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and AR and using procedure E, the title compound was obtained as a colourless solid (190 mg; 83% yield).

MS (ESI, m/z): 462.2 [M+H⁺].

Example 75 (R)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AA and AR and using procedure E, the title compound was obtained as an orange solid (54 mg; 23% yield).

MS (ESI, m/z): 463.0 [M+H⁺].

Example 76 (S)-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations AT and J and using procedure C, the title compound was obtained as a pale yellow solid (24 mg; 7% yield).

¹H NMR (DMSO-d₆) δ: 10.54 (s, 1H), 8.44 (d, J=4.4 Hz, 1H), 7.94 (d, J=9.7 Hz, 1H), 7.52 (dd, J=4.4, 0.6 Hz, 1H), 7.31 (m, 2H), 7.04 (m, 1H), 6.77 (d, J=9.7 Hz, 1H), 4.74 (m, 1H), 4.38 (m, 1H), 4.10 (m, 2H), 3.90 (m, 1H), 3.66 (m, 1H), 3.42 (s, 2H), 2.90 (m, 2H), 2.69 (m, 2H), 1.86 (m, 2H).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 77 (S)-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations AT and K and using procedure D, the title compound was obtained as a beige solid (25 mg; 7% yield).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 78 (R)-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations V and K and using procedure D, the title compound was obtained as a pale yellow solid (150 mg, 42% yield).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 79 (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AD and AU and using procedure E, the title compound was obtained as a pale yellow foam (195 mg; 79% yield).

¹H NMR (DMSO-d₆) δ: 10.53 (s, 1H), 8.13 (m, 1H), 7.76 (dd, J=8.8, 4.1 Hz, 1H), 7.34 (d, J=2.3 Hz, 1H), 7.29 (d, J=8.5 Hz, 1H), 7.10 (m, 2H), 4.87 (m, 1H), 4.65 (m, 1H), 4.44 (dd, J=12.9, 8.2 Hz, 1H), 4.08 (m, 2H), 3.62 (dd, J=8.8, 7.0 Hz, 1H), 3.41 (s, 2H), 2.60 (m, 2H), 1.74 (m, 2H), 1.74 (m, 2H).

Example 80 (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AD and AV and using procedure E, the title compound was obtained as a pale yellow solid (215 mg; 90% yield).

¹H NMR (DMSO-d₆) δ: 10.69 (s, 1H), 8.13 (s, 1H), 7.76 (dd, J=8.8, 4.4 Hz, 1H), 7.31 (d, J=2.3 Hz, 1H), 7.13 (t, J=9.1 Hz, 1H), 6.91 (m, 2H), 4.51 (s, 2H), 4.43 (m, 1H), 4.07 (m, 2H), 2.60 (m, 2H), 1.75 (m, 2H), 1.55 (m, 2H).

Example 81 (RS)-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and O and using procedure D, the title compound was obtained as a pale yellow solid (42 mg; 18% yield).

MS (ESI, m/z): 463.2 [M+H⁺].

Example 82 (RS)-1-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and Q and using procedure C, the title compound was obtained as a beige solid (65 mg; 29% yield).

MS (ESI, m/z): 447.3 [M+H⁺].

Example 83 (RS)-1-({3-[(RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and AW and using procedure C, the title compound was obtained as a beige solid (40 mg; 16% yield).

MS (ESI, m/z): 490.9 [M+H⁺].

Example 84 (RS)-3-fluoro-4-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compound of Preparation AX and intermediate K.iv and using procedure C, the title compound was obtained as a light brown solid (4 mg; 3% yield).

MS (ESI, m/z): 482.2 [M+H⁺].

Example 85 (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and AU and using procedure E, the title compound was obtained as an off-white solid (182 mg; 77% yield).

MS (ESI, m/z): 476.9 [M+H⁺].

Example 86 (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and AV and using procedure E, the title compound was obtained as an off-white solid (167 mg; 72% yield).

MS (ESI, m/z): 460.9 [M+H⁺].

Example 87 (S)-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and J and using procedure C, the title compound was obtained as a light brown solid (82 mg; 27% yield).

MS (ESI, m/z): 462.9 [M+H⁺].

Example 88 (S)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Preparation AS and intermediate K.iv and using procedure C, the title compound was obtained as a light brown solid (99 mg; 33% yield).

MS (ESI, m/z): 463.0 [M+H⁺].

Example 89 (S)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and AY and using procedure C, the title compound was obtained as a light brown solid (76 mg; 26% yield).

MS (ESI, m/z): 447.0 [M+H⁺].

Example 90 (RS)-9-fluoro-1-[((3-hydroxy-propyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 90.i. (RS)-1-[([3-(tert-butyl-dimethyl-silanyloxy)-propy]-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Example 4 and 3-(tert-butyldimethylsilyloxy)-propionaldehyde and using procedure E, the title compound was obtained as a yellow foam (82 mg; 87% yield).

MS (ESI, m/z): 667.4 [M+H⁺].

90.ii. (RS)-9-fluoro-1-[((3-hydroxy-propyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 90.i and using procedure J, the title compound was obtained as a light yellow foam (46 mg; 68% yield).

MS (ESI, m/z): 553.2 [M+H⁺].

Example 91 (RS)-9-fluoro-1-[((2-hydroxy-ethyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 91.i. (RS)-1-[([2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Example 4 and tert-butyldimethylsilyloxy-acetaldehyde and using procedure E, the title compound was obtained as a yellow foam (55 mg; 59% yield).

MS (ESI, m/z): 653.4 [M+H⁺].

91.ii. (RS)-9-fluoro-1-[((2-hydroxy-ethyl)-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethyl}-amino)-methyl]-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 91.i and using procedure J, the title compound was obtained as an off-white foam (25 mg; 55% yield).

MS (ESI, m/z): 539.2 [M+H⁺].

Example 92 (RS)-9-fluoro-1-((3-hydroxy-propyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 92.i. (RS)-1-([3-(tert-butyl-dimethyl-silanyloxy)-propyl]-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Example 13 and 3-(tert-butyldimethylsilyloxy)-propionaldehyde and using procedure E, the title compound was obtained as a yellow foam (62 mg; 46% yield).

MS (ESI, m/z): 667.4 [M+H⁺].

92.ii. (RS)-9-fluoro-1-((3-hydroxy-propyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 92.i and using procedure J, the title compound was obtained as an off-white foam (20 mg; 39% yield).

MS (ESI, m/z): 553.2 [M+H⁺].

Example 93 (RS)-9-fluoro-1-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 93.i. (RS)-1-([2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Example 13 and tert-butyldimethylsilyloxy-acetaldehyde and using procedure E, the title compound was obtained as a yellow foam (57 mg; 43% yield).

MS (ESI, m/z): 653.4 [M+H⁺].

93.ii. (RS)-9-fluoro-1-((2-hydroxy-ethyl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from intermediate 93.i and using procedure J, the title compound was obtained as a yellowish foam (15 mg; 32% yield).

MS (ESI, m/z): 539.2 [M+H⁺].

Example 94 (RS)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations AX and U and using procedure E, the title compound was obtained as a light yellow solid (44 mg; 36% yield).

MS (ESI, m/z): 496.2 [M+H⁺].

Example 95 (RS)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations AX and T and using procedure E, the title compound was obtained as a light yellow foam (43 mg; 37% yield).

MS (ESI, m/z): 480.2 [M+H⁺].

Example 96 (RS)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations AX and AU and using procedure E, the title compound was obtained as an off-white foam (53 mg; 44% yield).

MS (ESI, m/z): 496.2 [M+H⁺].

Example 97 (RS)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations AX and AV and using procedure E, the title compound was obtained as a light yellow foam (44 mg; 38% yield).

MS (ESI, m/z): 480.2 [M+H⁺].

Example 98 (RS)-3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and S and using procedure C, the title compound was obtained as a yellow foam (12 mg; 6% yield).

MS (ESI, m/z): 466.2 [M+H⁺].

Example 99 (RS)-3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and AI and using procedure C, the title compound was obtained as a yellow solid (48 mg; 21% yield).

MS (ESI, m/z): 496.2 [M+H⁺].

Example 100 (RS)-3-fluoro-4-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and N and using procedure D, the title compound was obtained as a yellow foam (27 mg; 12% yield).

MS (ESI, m/z): 482.2 [M+H⁺].

Example 101 (RS)-3-fluoro-4-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and O and using procedure D, the title compound was obtained as a yellow foam (19 mg; 9% yield).

MS (ESI, m/z): 482.2 [M+H⁺].

Example 102 (RS)-3-fluoro-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and H and using procedure C, the title compound was obtained as a yellow foam (15 mg; 7% yield).

MS (ESI, m/z): 480.2 [M+H⁺].

Example 103 (RS)-3-fluoro-4-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations E and I and using procedure C, the title compound was obtained as a yellow solid (16 mg; 11% yield).

MS (ESI, m/z): 480.2 [M+H⁺].

Example 104 (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AZ and T and using procedure E, the title compound was obtained as a beige solid (97 mg; 40% yield).

MS (ESI, m/z): 480.2 [M+H⁺].

Example 105 (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AZ and U and using procedure E, the title compound was obtained as a beige solid (81 mg; 32% yield).

MS (ESI, m/z): 496.2 [M+H⁺].

Example 106 (RS)-6-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AC and O and using procedure D, the title compound was obtained as a beige solid (158 mg; 31% yield).

MS (ESI, m/z): 464.2 [M+H⁺].

Example 107 (RS)-1-{2-[(S)-3-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-2-oxo-oxazolidin-5-yl]-ethylamino}-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and AQ and using procedure C, the title compound was obtained as a light brown solid (20 mg; 23% yield).

MS (ESI, m/z): 452.2 [M+H⁺].

Example 108 (RS)—N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[(RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide 108.i. (RS)-3-(tert-butyl-dimethyl-silanyloxy)-(3RS)-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionic acid

Starting from a solution of intermediate BA.iii (400 mg; see Preparation B) in DCM and treating with TFA, the title intermediate was obtained, after aqueous workup and trituration with ether, as a colourless solid (0.2 g, 56% yield).

MS (ESI, m/z): 453.0 [M+H⁺].

108.ii. (RS)—N—((S)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-3-hydroxy-3-[(RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionamide

A propylphosphonic anhydride solution (50% in EA, 0.31 ml) was added dropwise to a solution of the compound of Preparation C (0.1 g), intermediate 108.i (0.22 g) and DIPEA (0.26 mL) in DMF (4 mL). The mixture was stirred at rt for 1 h and partitioned between water and EA. The org. phase was washed with dilute HCl and brine, dried over MgSO₄ and concentrated. Purification of the crude using CC (EA/MeOH 19:1) gave a mixture of diastereomeric compounds (ratio and relative stereochemistry was not elucidated) as a colourless solid (245 mg). This intermediate was treated with HCl in MeOH (1.25/14), stirred at rt for 1 h, concentrated in vacuo, partitioned between EA and a bicarbonate solution. The product precipitated out of this mixture, was filtered off and dried under HV to give the title compound as a colourless solid (20 mg, mixture of diastereomers).

MS (ESI, m/z): 525.1 [M+H⁺].

Example 109 (R)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BC and U and using procedure E, the title compound was obtained as a colourless solid (96 mg; 67% yield).

MS (ESI, m/z): 477.2 [M+H⁺].

Example 110 (RS)-6-({[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AC and N and using procedure D, the title compound was obtained as a colourless solid (15 mg; 3% yield).

MS (ESI, m/z): 464.2 [M+H⁺].

Example 111 (R)-7-fluoro-2-methoxy-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations BB and T and using procedure E, the title compound was obtained as a colourless solid (100 mg; 39% yield).

MS (ESI, m/z): 510.2 [M+H⁺].

Example 112 (R)-7-fluoro-2-methoxy-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations BB and U and using procedure E, the title compound was obtained as a colourless solid (75 mg; 28% yield).

MS (ESI, m/z): 526.2 [M+H⁺].

Example 113 (1RS)-9-fluoro-1-{(3RS)-3-hydroxy-3-[(5RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 113.i. 3-(tert-butyl-dimethyl-silanyloxy)-3-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propionaldehyde (mixture of diastereomers)

To a solution of the compound of Preparation BA (0.2 g) and DIPEA (0.23 mL) in DCM (5 mL) at rt was added dropwise a solution of SO₃.Pyr complex (0.145 g) in DMSO (0.5 mL) over 2 min. The mixture was stirred at rt for 1.5 h and partitioned between water and DCM. The org. phase was washed several times with water, dried over MgSO₄ and concentrated. The crude product was used as such in the next step (yield assumed to be quantitative).

MS (ESI, m/z): 437.1 [M+H⁺].

113.ii. (1RS)-9-fluoro-1-{(3RS)-3-hydroxy-3-[(5RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compound of Preparation C and intermediate 113.i and using procedure E followed by TBDMS cleavage using procedure J, the title compound was obtained as a yellowish solid (21 mg; 9% yield).

MS (ESI, m/z): 510.6 [M+H⁺].

Example 114 (S)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one

A solution of the compound of Example 48 (33 mg) in MeOH/DCE (5 mL; 4:1) was treated with NaBH₄ (3 mg) for 30 min then quenched with 1M HCl (1 mL) and partitioned between DCM and an aq. NH₄OH solution. The org. layer was washed with water and brine, dried over MgSO₄ and purified by CC (EA/MeOH 19:1 to 9:1 containing 1% NH₄OH) affording a colourless solid (26 mg; 78% yield).

MS (ESI, m/z): 480.4 [M+H⁺].

Example 115 (RS)-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations G and BK and using procedure E, the title compound was obtained as an orange solid (95 mg, 40% yield).

¹H NMR (DMSO-d₆) δ: 10.82 (s, 1H), 8.17 (s, 1H), 7.77 (m, 1H), 7.68 (m, 2H), 7.60 (d, J=7.3 Hz, 1H), 7.31 (dd, J=7.9, 7.3 Hz, 1H), 4.71 (m, 2H), 4.44 (m, 1H), 4.19 (m, 1H), 4.05 (dd, J=12.9, 3.8 Hz, 1H), 3.69 (dd, J=10.3, 7.0 Hz, 1H), 3.51 (s, 2H), 2.64 (m, 2H), 1.76 (m, 2H), 1.50 (m, 2H).

MS (ESI, m/z): 479.4 [M+H⁺].

Example 116 (RS)-9-bromo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BE and U and using procedure E, the title compound was obtained as a colourless solid (10 mg, 9% yield).

MS (ESI, m/z): 555.2 [M+H⁺].

Example 117 (RS)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile

Starting from the compounds of Preparations BV and U and using procedure E, the title compound was obtained as a colourless solid (14 mg, 21% yield).

MS (ESI, m/z): 502.5 [M+H⁺]

Example 118 (RS)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile

Starting from the compounds of Preparations BV and BK and using procedure E, the title compound was obtained as a colourless solid (15 mg, 22% yield).

¹H NMR (CDCl₃) δ: 7.83 (dd, J=8.5, 1.2 Hz, 1H), 7.75 (d, J=9.4 Hz, 1H), 7.58 (m, 2H), 7.41 (d, J=7.9 Hz, 1H), 6.81 (d, J=9.4 Hz, 1H), 5.02 (m, 1H), 4.69 (m, 1H), 4.53 (m, 1H), 4.28 (m, 2H), 3.76 (dd, J=10.5, 7.3 Hz, 1H), 3.43 (s, 2H), 2.75 (m, 2H), 1.92 (m, 5H).

MS (ESI, m/z): 503.6 [M+H⁺].

Example 119 (R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic acid ethyl ester

Starting from the compounds of Preparations BF and AU and using procedure E, the title compound was obtained as a colourless solid (910 mg, 66% yield).

MS (ESI, m/z): 549.2 [M+H⁺]

Example 120 (R)-7-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BG and AU and using procedure E, the title compound was obtained as a beige solid (40 mg, 16% yield).

MS (ESI, m/z): 507.2 [M+H⁺].

Example 121 (R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-7-carboxylic acid hydrochloride

A suspension of the compound of Example 119 (100 mg) in 6M HCl (0.6 mL) was stirred at 90° C. for 6 h. The reaction mixture was evaporated under reduced pressure and the residue was taken up in MeOH and collected by filtration, affording a beige solid (37 mg; 36% yield).

MS (ESI, m/z): 521.5 [M+H⁺].

Example 122 (R)-7-dimethylaminomethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BH and AU and using procedure E, the title compound was obtained as a beige solid (39 mg; 30% yield).

MS (ESI, m/z): 534.5 [M+H⁺].

Example 123 (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-7-pyrrolidin-1-ylmethyl-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BI and AU and using procedure E, the title compound was obtained as a beige foam (50 mg, 27% yield).

MS (ESI, m/z): 560.6 [M+H⁺].

Example 124 (RS)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and BJ and using procedure E, the title compound was obtained as a colourless foam (87 mg, 60% yield).

MS (ESI, m/z): 480.5 [M+H⁺].

Example 125 (RS)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and BK and using procedure E, the title compound was obtained as a colourless solid (84 mg, 49% yield).

¹H NMR (CDCl₃) δ: 8.04 (m, 1H), 7.88 (dd, J=8.5, 2.9 Hz, 1H), 7.68 (dd, J=9.4, 1.2 Hz, 1H), 7.60 (dd, J=8.5, 1.5 Hz, 1H), 7.47 (dd, J=8.8, 4.7 Hz, 1H), 6.91 (t, J=9.1 Hz, 1H), 6.63 (d, J=9.4 Hz, 1H), 5.00 (m, 1H), 4.66 (m, 1H), 4.51 (m, 1H), 4.27 (m, 2H), 3.77 (dt, J=10.3, 6.7 Hz, 1H), 3.47 (s, 2H), 2.77 (m, 2H), 1.80 (m, 4H).

MS (ESI, m/z): 496.6 [M+H⁺].

Example 126 (RS)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and BL and using procedure E, the title compound was obtained as a colourless solid (54 mg, 32% yield).

¹H NMR (CDCl₃) δ: 8.03 (m, 1H), 7.88 (dd, J=8.8, 2.9 Hz, 1H), 7.68 (dd, J=9.4, 0.9 Hz, 1H), 7.60 (dd, J=8.5, 1.5 Hz, 1H), 7.47 (dd, J=8.8, 4.7 Hz, 1H), 6.91 (t, J=9.1 Hz, 1H), 6.63 (d, J=9.4 Hz, 1H), 5.00 (m, 1H), 4.66 (m, 1H), 4.51 (m, 1H), 4.28 (m, 2H), 3.77 (dt, J=10.5, 7.0 Hz, 1H), 3.47 (s, 2H), 2.77 (m, 2H), 1.80 (m, 4H).

MS (ESI, m/z): 496.6 [M+H⁺].

Examples 127 and 128 (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

The product of Example 13 was separated by preparative chiral HPLC using a 5 μm (R,R)-Whelk-01 column (21.1×250 mm) eluting with 1:1 MeCN-EtOH containing 0.1% of diethylamine with t_(R)=7.25 min (compound of Example 127, 100% ee) and t_(R)=10.26 min (compound of Example 128, 100% ee).

Data Obtained for the Compound of Example 127:

¹H NMR (CDCl₃) δ: 7.69 (d, J=9.7 Hz, 1H), 7.47 (dd, J=8.8, 4.7 Hz, 1H), 7.31 (d, J=2.3 Hz, 1H), 7.22 (d, J=8.5 Hz, 1H), 6.91 (m, 2H), 6.60 (d, J=9.4 Hz, 1H), 4.95 (dd, J=8.2, 3.5 Hz, 1H), 4.64 (m, 1H), 4.48 (m, 1H), 4.26 (dd, J=13.5, 3.5 Hz, 1H), 4.04 (t, J=8.8 Hz, 1H), 3.59 (dd, J=8.8, 7.0 Hz, 1H), 3.34 (s, 2H), 2.73 (m, 2H), 1.76 (m, 4H).

MS (ESI, m/z): 495.3 [M+H⁺].

Data Obtained for the Compound of Example 128:

¹H NMR (CDCl₃) δ: 7.68 (d, J=9.4 Hz, 1H), 7.46 (dd, J=8.5, 4.7 Hz, 1H), 7.31 (d, J=2.3 Hz, 1H), 7.21 (d, J=8.5 Hz, 1H), 6.90 (m, 2H), 6.59 (d, J=9.4 Hz, 1H), 4.94 (dd, J=8.2, 2.9 Hz, 1H), 4.62 (m, 1H), 4.47 (dd, J=13.2, 8.2 Hz, 1H), 4.24 (dd, J=13.5, 3.5 Hz, 1H), 4.02 (t, J=8.5 Hz, 1H), 3.60 (m, 1H), 3.33 (s, 2H), 2.72 (m, 2H), 1.74 (m, 4H).

MS (ESI, m/z): 495.3 [M+H⁺].

Examples 129 and 130 (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one First Step:

Starting from the compound of Example 4 and 3-(tert-butyldimethylsilyloxy)-propionaldehyde and using procedure E, the title compound was obtained as a yellow foam (82 mg; 87% yield).

MS (ESI, m/z): 667.4 [M+H⁺].

Second Step:

The product from the first step was separated by preparative chiral HPLC using a 5 μm (R,R)-Whelk-01 column (21.1×250 mm) eluting with 1:1 MeCN-EtOH containing 0.1% of diethylamine with t_(R)=7.41 min (compound of Example 129, 100% ee) and t_(R)=10.35 min (compound of Example 130, 100% ee).

Data Obtained for the Compound of Example 129:

¹H NMR (CDCl₃) δ: 7.68 (d, J=9.4 Hz, 1H), 7.46 (dd, J=8.8, 4.7 Hz, 1H), 7.30 (d, J=2.1 Hz, 1H), 7.20 (d, J=8.5 Hz, 1H), 6.90 (m, 2H), 6.58 (d, J=9.4 Hz, 1H), 4.94 (dd, J=8.2, 3.2 Hz, 1H), 4.63 (m, 1H), 4.46 (dd, J=13.5, 8.5 Hz, 1H), 4.23 (dd, J=13.5, 3.5 Hz, 1H), 4.02 (t, J=8.5 Hz, 1H), 3.58 (dd, J=7.9, 7.0 Hz, 1H), 3.33 (s, 2H), 2.72 (m, 2H), 1.74 (m, 4H).

MS (ESI, m/z): 495.4 [M+H⁺].

Data Obtained for the Compound of Example 130:

¹H NMR (CDCl₃) δ: 7.68 (d, J=9.4 Hz, 1H), 7.46 (dd, J=8.8, 4.7 Hz, 1H), 7.30 (d, J=2.3 Hz, 1H), 7.21 (d, J=8.5 Hz, 1H), 6.90 (m, 2H), 6.59 (d, J=9.4 Hz, 1H), 4.94 (dd, J=8.5, 3.5 Hz, 1H), 4.64 (m, 1H), 4.47 (m, 1H), 4.24 (dd, J=13.2, 3.5 Hz, 1H), 4.03 (t, J=8.5 Hz, 1H), 3.59 (dd, J=8.8, 7.0 Hz, 1H), 3.33 (s, 2H), 2.71 (m, 2H), 1.75 (m, 4H).

MS (ESI, m/z): 495.4 [M+H⁺].

Example 131 (R)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AA and BJ and using procedure E, the title compound was obtained as a yellowish solid (61 mg, 42% yield).

¹H NMR (DMSO-d6) δ: 11.14 (s, 1H), 8.13 (s, 1H), 7.76 (dd, J=8.8, 4.4 Hz, 1H), 7.56 (m, 1H), 7.39 (d, J=8.8 Hz, 1H), 7.13 (t, J=9.1 Hz, 1H), 4.66 (s, 1H), 4.58 (s, 3H), 4.44 (m, 1H), 4.18 (m, 1H), 4.08 (dd, J=13.2, 3.2 Hz, 1H), 3.67 (dd, J=10.0, 7.0 Hz, 1H), 2.60 (m, 2H), 1.74 (m, 2H), 1.49 (m, 2H).

MS (ESI, m/z): 481.4 [M+H⁺].

Example 132 (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AA and BK and using procedure E, the title compound was obtained as a colourless solid (50 mg, 50% yield).

¹H NMR (DMSO-d6) δ: 10.81 (s, 1H), 8.13 (s, 1H), 7.77 (m, 2H), 7.66 (m, 1H), 7.13 (t, J=9.1 Hz, 1H), 4.90 (m, 1H), 4.69 (m, 1H), 4.44 (dd, J=12.9, 8.2 Hz, 1H), 4.19 (m, 1H), 4.08 (m, 1H), 3.68 (dd, J=10.0, 7.0 Hz, 1H), 3.51 (s, 2H), 2.60 (dd, J=1.2, 0.6 Hz, 2H), 1.75 (m, 2H), 1.50 (m, 2H).

Example 133 (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BC and AU and using procedure E, the title compound was obtained as a yellow solid (54 mg, 45% yield).

MS (ESI, m/z): 477.2 [M+H⁺].

Example 134 (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BC and AV and using procedure E, the title compound was obtained as a colourless solid (80 mg, 69% yield).

MS (ESI, m/z): 461.2 [M+H⁺].

Example 135 (R)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BC and BJ and using procedure E, the title compound was obtained as an off-white solid (75 mg, 65% yield).

MS (ESI, m/z): 462.1 [M+H⁺].

Example 136 (S)-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and BL and using procedure E, the title compound was obtained as a beige solid (31 mg, 33% yield).

¹H NMR (DMSO-d6) δ: 10.82 (s, 1H), 7.89 (d, J=9.7 Hz, 1H), 7.77 (m, 1H), 7.66 (m, 1H), 7.55 (m, 2H), 7.18 (t, J=7.6 Hz, 1H), 6.54 (d, J=9.4 Hz, 1H), 4.70 (m, 2H), 4.37 (m, 1H), 4.19 (m, 1H), 4.00 (m, 1H), 3.69 (m, 1H), 3.51 (s, 2H), 2.64 (m, 2H), 1.76 (m, 2H), 1.52 (m, 2H).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 137 (S)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AS and BK and using procedure E, the title compound was obtained as an off-white foam (143 mg, 60% yield).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 138 (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and U and using procedure E, the title compound was obtained as an off-white foam (17 mg, 14% yield).

¹H NMR (CDCl₃) δ: 9.04 (s, 1H), 8.36 (s, 1H), 7.87 (m, 1H), 7.41 (d, J=2.1 Hz, 1H), 7.23 (m, 1H), 6.84 (m, 2H), 5.04 (dd, J=8.5, 3.8 Hz, 1H), 4.59 (m, 2H), 4.28 (dd, J=13.5, 3.8 Hz, 1H), 4.04 (t, J=8.8 Hz, 1H), 3.59 (m, 1H), 3.36 (s, 2H), 2.80 (m, 2H), 1.83 (m, 5H).

MS (ESI, m/z): 496.3 [M+H⁺].

Example 139 (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and AU and using procedure E, the title compound was obtained as a yellowish foam (10 mg, 8% yield).

¹H NMR (CDCl₃) δ: 8.37 (s, 1H), 7.90 (m, 1H), 7.32 (d, J=2.6 Hz, 1H), 7.24 (m, 2H), 6.90 (m, 1H), 6.82 (d, J=9.7 Hz, 1H), 5.06 (m, 1H), 4.60 (m, 2H), 4.30 (m, 1H), 4.05 (t, J=8.8 Hz, 1H), 3.61 (m, 1H), 3.35 (s, 2H), 2.81 (m, 2H), 1.79 (m, 4H).

MS (ESI, m/z): 496.6 [M+H⁺].

Example 140 (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and T and using procedure E, the title compound was obtained as yellowish foam (6 mg, 5%).

¹H NMR (CDCl₃) δ: 8.36 (d, J=1.2 Hz, 1H), 7.89 (d, J=9.7 Hz, 1H), 7.30 (d, J=2.6 Hz, 1H), 6.81 (m, 3H), 5.03 (m, 1H), 4.59 (m, 4H), 4.26 (dd, J=13.2, 3.8 Hz, 1H), 4.03 (t, J=8.5 Hz, 1H), 3.58 (m, 1H), 2.77 (m, 2H), 1.77 (m, 5H).

MS (ESI, m/z): 480.6 [M+H⁺].

Example 141 (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and AV and using procedure E, the title compound was obtained as a yellowish foam (8 mg, 7% yield).

¹H NMR (CDCl₃) δ: 8.37 (d, J=1.5 Hz, 1H), 7.90 (d, J=9.7 Hz, 1H), 7.36 (d, J=2.3 Hz, 1H), 6.90 (m, 1H), 6.83 (d, J=9.4 Hz, 1H), 6.73 (dd, J=8.8, 2.6 Hz, 1H), 5.03 (m, 1H), 4.59 (m, 4H), 4.25 (dd, J=13.2, 3.8 Hz, 1H), 4.04 (t, J=8.5 Hz, 1H), 3.59 (m, 1H), 2.76 (m, 2H), 1.78 (m, 5H).

MS (ESI, m/z): 480.6 [M+H⁺].

Example 142 (R)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and BK and using procedure E, the title compound was obtained as a yellowish solid (24 mg, 20% yield).

¹H NMR (DMSO-d₆) δ: 10.81 (s, 1H), 8.45 (d, J=0.9 Hz, 1H), 7.96 (d, J=9.7 Hz, 1H), 7.77 (m, 1H), 7.66 (m, 1H), 6.75 (d, J=9.7 Hz, 1H), 4.95 (m, 1H), 4.70 (m, 1H), 4.44 (dd, J=12.9, 8.5 Hz, 1H), 4.19 (m, 1H), 4.04 (dd, J=12.9, 3.5 Hz, 1H), 3.69 (dd, J=10.3, 7.0 Hz, 1H), 3.51 (s, 2H), 2.67 (m, 3H), 1.75 (m, 2H), 1.51 (m, 2H).

MS (ESI, m/z): 497.4 [M+H⁺].

Example 143 (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and BL and using procedure E, the title compound was obtained as an off-white solid (26 mg, 21% yield).

¹H NMR (DMSO-d₆) δ: 10.81 (s, 1H), 8.45 (d, J=0.6 Hz, 1H), 7.96 (dd, J=9.7, 0.6 Hz, 1H), 7.77 (m, 1H), 7.66 (m, 1H), 6.75 (d, J=9.7 Hz, 1H), 4.95 (m, 1H), 4.70 (m, 1H), 4.44 (m, 1H), 4.19 (m, 1H), 4.04 (dd, J=12.6, 3.5 Hz, 1H), 3.69 (m, 1H), 3.51 (s, 3H), 2.67 (m, 3H), 1.76 (m, 2H), 1.52 (m, 2H).

MS (ESI, m/z): 497.3 [M+H⁺].

Example 144 (R)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BM and BJ and using procedure E, the title compound was obtained as a colourless solid (20 mg, 17% yield).

¹H NMR (DMSO-d₆) δ: 11.15 (s, 1H), 8.45 (d, J=1.5 Hz, 1H), 7.96 (d, J=9.7 Hz, 1H), 7.57 (m, 1H), 7.40 (m, 1H), 6.75 (d, J=9.7 Hz, 1H), 4.95 (m, 1H), 4.67 (m, 1H), 4.58 (s, 2H), 4.44 (dd, J=12.9, 8.5 Hz, 1H), 4.18 (m, 1H), 4.04 (dd, J=12.6, 3.5 Hz, 1H), 3.69 (m, 1H), 2.68 (m, 3H), 1.75 (m, 2H), 1.52 (m, 2H).

MS (ESI, m/z): 481.5 [M+H⁺].

Example 145 (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and U and using procedure E, the title compound was obtained as a yellowish foam (16 mg, 13% yield).

¹H NMR (CDCl₃) δ: 8.37 (d, J=1.2 Hz, 1H), 7.89 (d, J=9.7 Hz, 1H), 7.31 (d, J=2.3 Hz, 1H), 7.22 (d, J=8.5 Hz, 1H), 6.91 (dd, J=8.5, 2.3 Hz, 1H), 6.81 (d, J=9.7 Hz, 1H), 5.08 (m, 1H), 4.60 (m, 2H), 4.32 (m, 1H), 4.05 (m, 1H), 3.60 (m, 1H), 3.34 (s, 2H), 2.83 (m, 2H), 1.85 (m, 4H).

MS (ESI, m/z): 496.5 [M+H⁺].

Example 146 (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and T and using procedure E, the title compound was obtained as a yellow foam (7 mg, 6% yield).

MS (ESI, m/z): 480.6 [M+H⁺].

Example 147 (S)-3-fluoro-4-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and BK and using procedure E, the title compound was obtained as a colourless solid (13 mg, 11% yield).

¹H NMR (DMSO-d₆) δ: 10.82 (s, 1H), 8.45 (s, 1H), 7.96 (d, J=10.0 Hz, 1H), 7.77 (m, 1H), 7.66 (m, 1H), 6.75 (d, J=10.0 Hz, 1H), 4.96 (m, 1H), 4.69 (m, 1H), 4.44 (m, 1H), 4.19 (m, 1H), 4.04 (m, 1H), 3.69 (m, 1H), 3.50 (s, 2H), 2.66 (m, 2H), 1.75 (m, 2H), 1.51 (m, 2H).

MS (ESI, m/z): 497.6 [M+H⁺].

Example 148 (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and AU and using procedure E, the title compound was obtained as a yellowish foam (30 mg, 25% yield).

¹H NMR (CDCl₃) δ: 8.36 (d, J=1.5 Hz, 1H), 7.89 (d, J=10.0 Hz, 1H), 7.32 (d, J=2.3 Hz, 1H), 7.22 (d, J=8.5 Hz, 1H), 6.90 (dd, J=8.5, 2.3 Hz, 1H), 6.81 (d, J=9.7 Hz, 1H), 5.04 (ddd, J=8.5, 4.1, 0.6 Hz, 1H), 4.59 (m, 2H), 4.27 (dd, J=13.2, 3.8 Hz, 1H), 4.05 (m, 1H), 3.60 (dd, J=9.1, 7.3 Hz, 1H), 3.35 (s, 2H), 2.79 (m, 2H), 1.78 (m, 5H).

MS (ESI, m/z): 496.6 [M+H⁺].

Example 149 (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and AV and using procedure E, the title compound was obtained as a yellow foam (8 mg, 7% yield).

MS (ESI, m/z): 480.5 [M+H⁺].

Example 150 (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and BL and using procedure E, the title compound was obtained as an orange foam (6 mg, 5% yield).

MS (ESI, m/z): 497.4 [M+H⁺]

Example 151 (S)-3-fluoro-4-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

Starting from the compounds of Preparations BN and BJ and using procedure E, the title compound was obtained as a yellowish solid (11 mg, 9% yield).

¹H NMR (DMSO-d₆) δ: 11.15 (s, 1H), 8.45 (s, 1H), 7.96 (d, J=9.7 Hz, 1H), 7.57 (m, 1H), 7.40 (m, 1H), 6.75 (d, J=10.0 Hz, 1H), 4.96 (m, 1H), 4.67 (m, 1H), 4.58 (s, 2H), 4.44 (m, 1H), 4.19 (m, 1H), 4.05 (m, 1H), 3.68 (m, 1H), 2.66 (m, 2H), 1.76 (m, 2H), 1.51 (m, 3H).

MS (ESI, m/z): 481.5 [M+H⁺].

Example 152 (RS)-9-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BO and U and using procedure E, the title compound was obtained as a colourless solid (32 mg, 38% yield).

MS (ESI, m/z): 491.2 [M+H⁺].

Example 153 (RS)-9-fluoro-1-(methyl-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-amino)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

A suspension of the compound of Example 152 (20 mg) in MeOH (2 mL) was treated with an aq. formaldehyde solution (37%; 16 μL) for 10 min, then treated with NaBH₃CN (2.5 mg). After 3 h stirring at rt, the reaction mixture was taken up in water and extracted with EA. The org. layer was washed with water, brine and dried over MgSO₄. The org. layer was filtrated and evaporated under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH 100:50:4), affording a colourless foam (9 mg; 44% yield).

¹H NMR (CDCl₃) δ: 8.50 (s, 1H), 7.70 (d, J=9.7 Hz, 1H), 7.48 (dd, J=8.5, 4.4 Hz, 1H), 7.40 (d, J=2.1 Hz, 1H), 7.27 (m, 1H), 6.94 (m, 2H), 6.64 (d, J=9.4 Hz, 1H), 5.03 (t, J=6.4 Hz, 1H), 4.67 (m, 1H), 4.38 (d, J=6.4 Hz, 2H), 4.08 (m, 1H), 3.62 (m, 1H), 3.40 (s, 2H), 2.50 (m, 2H), 2.22 (d, J=4.1 Hz, 3H), 1.77 (m, 4H).

MS (ESI, m/z): 509.3 [M+H⁺].

Example 154 (RS)-6-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AC and H and using procedure C, the title compound was obtained as a yellowish foam (82 mg, 35% yield).

MS (ESI, m/z): 462.1 [M+H⁺]

Example 155 (RS)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AC and I and using procedure C, the title compound was obtained as yellow foam (90 mg, 39% yield).

MS (ESI, m/z): 462.1 [M+H⁺].

Example 156 (RS)-6-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations AC and J and using procedure C, the title compound was obtained as a brown foam (270 mg, 37% yield).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 157 (R)-1-{2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BC and H and using procedure C, the title compound was obtained as a yellowish foam (59 mg, 26% yield).

MS (ESI, m/z): 447.2 [M+H⁺].

Example 158 (R)-1-{2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BC and J and using procedure C, the title compound was obtained as a brown foam (81 mg, 35% yield).

MS (ESI, m/z): 463.2 [M+H⁺].

Example 159 (RS)-9-fluoro-1-{4-[(RS)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-butylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations C and BP and using procedure E, the title compound was obtained as a colourless foam (84 mg, 55% yield).

MS (ESI, m/z): 509.1 [M+H⁺].

Example 160 (S)-7-fluoro-6-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one

A solution of the compound of Example 79 (42 mg) in DCM/MeOH (2:1; 6 mL) was treated with NaBH₄ (3.2 mg). After 30 min stirring at rt, the reaction mixture was quenched with 1M HCl (1 mL) and partitioned between DCM and aq. NH₄OH. The org. layer was washed with water, dried over MgSO₄, concentrated under reduced pressure and purified by CC (EA/MeOH 19:1 to 9:1), affording a beige solid (29 mg; 69% yield).

MS (ESI, m/z): 498.2 [M+H⁺].

Example 161 (1R,2R)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester and (1S,2S)-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from the compounds of Preparations BQ and U and using procedure E, a mixture of the title compounds was obtained as a yellowish solid (46 mg, 23% yield).

MS (ESI, m/z): 535.6 [M+H⁺].

Example 162 (1R,2R)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester and (1S,2S)-4-oxo-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from the compounds of Preparations BQ and AU and using procedure E, a mixture of the title compounds was obtained as a colourless solid (67 mg, 32% yield).

MS (ESI, m/z): 535.7 [M+H⁺].

Example 163 (1R,2R)-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2S)-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BR and U and using procedure E, a mixture of the title compounds was obtained as a colourless solid (99 mg, 54% yield).

MS (ESI, m/z): 507.2 [M+H⁺].

Example 164 (1R,2R)-2-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2S)-2-hydroxymethyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BR and AU and using procedure E, a mixture of the title compounds was obtained as a colourless solid (110 mg, 60% yield).

MS (ESI, m/z): 507.2 [M+H⁺].

Example 165 (1R,2R)-2-methoxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2S)-2-methoxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BS and U and using procedure E, a mixture of the title compounds was obtained as a colourless solid (20 mg, 32% yield).

MS (ESI, m/z): 521.6 [M+H⁺].

Example 166 (1R,2S)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2R)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BT and U and using procedure E, a mixture of the title compounds was obtained as a colourless solid (56 mg, 38% yield).

¹H NMR (CDCl₃) δ: 8.57 (s, 1H), 7.71 (dd, J=9.4, 0.6 Hz, 1H), 7.52 (m, 2H), 7.33 (m, 1H), 7.23 (m, 2H), 6.99 (m, 1H), 6.69 (dd, J=9.4, 1.5 Hz, 1H), 4.82 (d, J=6.4 Hz, 1H), 4.65 (m, 1H), 4.26 (s, 1H), 4.05 (td, J=8.5, 6.2 Hz, 1H), 3.63 (m, 1H), 3.39 (s, 2H), 2.80 (m, 2H), 1.87 (m, 5H), 1.56 (d, J=6.7 Hz, 3H).

MS (ESI, m/z): 491.3 [M+H⁺].

Example 167 (1R,2S)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2R)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BT and AU and using procedure E, a mixture of the title compounds was obtained as a colourless solid (59 mg, 40% yield).

¹H NMR (CDCl₃) δ: 8.60 (dd, J=2.3, 0.6 Hz, 1H), 7.71 (dd, J=9.4, 0.9 Hz, 1H), 7.51 (m, 2H), 7.33 (dd, J=14.4, 2.3 Hz, 1H), 7.24 (m, 2H), 6.98 (td, J=8.2, 2.3 Hz, 1H), 6.69 (dd, J=9.4, 1.8 Hz, 1H), 4.80 (dt, J=6.4, 1.8 Hz, 1H), 4.64 (m, 1H), 4.24 (s, 1H), 4.05 (td, J=8.5, 5.9 Hz, 1H), 3.61 (dd, J=8.8, 7.0 Hz, 1H), 3.39 (s, 2H), 2.80 (m, 2H), 1.79 (m, 5H), 1.55 (d, J=6.4 Hz, 3H).

MS (ESI, m/z): 491.3 [M+H⁺].

Example 168 (1R,2S)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2R)-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BT and BK and using procedure E, a mixture of the title compounds was obtained as a colourless solid (42 mg, 24% yield).

¹H NMR (CDCl₃) δ: 8.50 (s, 1H), 7.81 (m, 1H), 7.68 (dd, J=9.4, 5.6 Hz, 1H), 7.51 (m, 3H), 7.19 (m, 1H), 6.63 (dd, J=9.4, 5.0 Hz, 1H), 4.76 (m, 1H), 4.62 (d, J=7.9 Hz, 1H), 4.18 (m, 2H), 3.72 (m, 1H), 3.43 (s, 2H), 2.76 (m, 2H), 1.77 (m, 5H), 1.53 (d, J=6.4 Hz, 3H).

MS (ESI, m/z): 492.3 [M+H⁺].

Example 169 (1R,2S)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2R)-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BT and BL and using procedure E, a mixture of the title compounds was obtained as a colourless solid (43 mg, 24% yield).

¹H NMR (CDCl₃) δ: 8.10 (m, 1H), 7.86 (dd, J=8.8, 3.8 Hz, 1H), 7.71 (dd, J=9.4, 1.5 Hz, 1H), 7.55 (m, 3H), 7.22 (m, 1H), 6.67 (d, J=9.4 Hz, 1H), 4.83 (m, 1H), 4.64 (m, 1H), 4.22 (m, 2H), 3.75 (dt, J=10.5, 7.3 Hz, 1H), 3.46 (s, 2H), 2.79 (m, 2H), 1.87 (m, 5H), 1.57 (dd, J=6.4, 1.2 Hz, 3H).

MS (ESI, m/z): 492.4 [M+H⁺].

Example 170 (1R,2R)-2-(1-hydroxy-1-methyl-ethyl)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one and (1S,2S)-2-(1-hydroxy-1-methyl-ethyl)-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BU and U and using procedure E, a mixture of the title compounds was obtained as a colourless foam (22 mg, 46% yield).

MS (ESI, m/z): 535.6 [M+H⁺].

Example 171 (R)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compound of Example 132 and proceeding in analogy to Example 160, the title compound was obtained as a colourless foam (36% yield).

MS (ESI, m/z): 499.4 [M+H⁺].

Example 172 N—((RS)-9-fluoro-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-N-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-acetamide and (RS)-1-{3-[(R)-3-(4-acetyl-3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-2-oxo-oxazolidin-5-yl]-propylamino}-9-fluoro-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

A solution of the compound of Example 13 (20 mg) and DIPEA (14 μL) was reacted at 0° C. with Ac₂O (6 μL). The reaction mixture was further stirred at rt for 5 h. The solvent was removed under reduced pressure and the residue was dissolved in DCM and sequentially washed with water and brine. The org. layer was dried over MgSO₄. The solvent was removed under reduced pressure and the residue was purified by CC (DCM/MeOH/NH₄OH; 1000:50:4), affording a 1:1-mixture of the two possible N-acetates as an off-white foam (18 mg; 83% yield).

MS (ESI, m/z): 537.5 [M+H⁺].

Example 173 (S)-4-hydroxy-4-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-4,5-dihydro-pyrrolo[3,2,1-de][1,5]naphthyridin-7-one

To a solution of the compound of Preparation BD (75 mg) in EtOH (3 mL) were added the compound of Preparation AP (89 mg, 1.5 eq.) and K₂CO₃ (65 mg, 3 eq.). The mixture was stirred at rt for 3 days. The solvent was removed under reduced pressure and the residue was partitioned between water and DCM-MeOH (9:1). The phases were separated and the aq. layer was extracted two more times with DCM-MeOH (9:1). The combined org. layers were dried over MgSO₄ and concentrated. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:100:8) to afford the title compound as a yellow solid (26 mg, 26% yield).

MS (ESI, m/z): 494.2 [M+H⁺].

Example 174 (RS)-9-fluoro-1-hydroxy-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from 9-fluoro-1-hydroxy-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl]methyl 4-methylbenzenesulfonate (prepared according to EP 1980251) and the compound of Preparation AP and using procedure C, the title compound was obtained as a yellow solid (85 mg, 65% yield).

MS (ESI, m/z): 511.2 [M+H⁺].

Example 175 (RS)-1-({[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-ylmethyl]-amino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and BW and using procedure C, the title compound was obtained as a beige solid (70 mg; 20% yield).

MS (ESI, m/z): 464.4 [M+H⁺].

Example 176 (RS)-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations AE and BX and using procedure C, the title compound was obtained as a colourless solid (130 mg; 36% yield).

MS (ESI, m/z): 478.2 [M+H⁺].

Example 177 (RS)-9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BY and BK and using procedure E, the title compound was obtained as a pale yellow solid (31 mg; 58% yield).

¹H NMR (CDCl₃) δ: 8.33 (m, 1H), 7.84 (dd, J=8.8, 4.4 Hz, 1H), 7.66 (dd, J=9.4, 3.5 Hz, 1H), 7.57 (dd, J=8.5, 2.3 Hz, 1H), 7.41 (dd, J=8.2, 1.8 Hz, 1H), 7.11 (dd, J=8.5, 1.5 Hz, 1H), 6.66 (dd, J=9.4, 3.8 Hz, 1H), 4.91 (m, 1H), 4.62 (m, 1H), 4.45 (m, 1H), 4.25 (m, 2H), 3.75 (m, 1H), 3.45 (s, 2H), 2.61 (m, 2H), 1.78 (m, 5H).

MS (ESI, m/z): 512.3 [M+H⁺].

Example 178 (RS)-9-chloro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BY and U and using procedure E, the title compound was obtained as a colourless solid (14 mg; 26% yield).

¹H NMR (CDCl₃) δ: 8.73 (s, 1H), 7.68 (d, J=9.7 Hz, 1H), 7.39 (m, 2H), 7.25 (m, 1H), 7.12 (d, J=8.2 Hz, 1H), 6.98 (m, 1H), 6.68 (d, J=9.4 Hz, 1H), 4.91 (dd, J=8.2, 3.5 Hz, 1H), 4.65 (m, 1H), 4.46 (m, 1H), 4.30 (dd, J=13.2, 3.2 Hz, 1H), 4.06 (m, 1H), 3.61 (m, 1H), 3.39 (s, 2H), 2.64 (m, 2H), 1.86 (m, 5H).

MS (ESI, m/z): 511.3 [M+H⁺].

Example 179 (RS)-9-ethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations BZ and U and using procedure E, the title compound was obtained as a colourless solid (11 mg; 36% yield).

¹H NMR (CDCl₃) δ: 8.56 (m, 1H), 7.68 (d, J=9.4 Hz, 1H), 7.39 (m, 2H), 7.26 (m, 1H), 7.01 (m, 2H), 6.64 (d, J=9.4 Hz, 1H), 4.82 (t, J=5.3 Hz, 1H), 4.65 (m, 1H), 4.37 (d, J=5.3 Hz, 2H), 4.06 (m, 1H), 3.61 (dd, J=8.5, 7.0 Hz, 1H), 3.39 (s, 2H), 2.80 (m, 4H), 1.71 (m, 5H), 1.29 (m, 3H).

MS (ESI, m/z): 505.5 [M+H⁺].

Example 180 (RS)-9-ethynyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CA and U and using procedure E, the title compound was obtained as a colourless solid (10 mg; 21% yield).

MS (ESI, m/z): 501.2 [M+H⁺].

Example 181 (1R*,2R*)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid methyl ester

Starting from the compounds of Preparations CB and U and using procedure E, the title compound was obtained as an off-white foam (23 mg; 20% yield).

MS (ESI, m/z): 553.6 [M+H⁺].

Example 182 (1R*,2R*)-9-fluoro-2-hydroxymethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CC and U and using procedure E, the title compound was obtained as a white foam (44 mg; 38% yield).

MS (ESI, m/z): 525.3 [M+H⁺].

Example 183 (1R*,2S*)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CD and U and using procedure E, the title compound was obtained as an off-white foam (12 mg; 10% yield).

MS (ESI, m/z): 509.3 [M+H⁺].

Example 184 (1R*,2S*)-9-fluoro-2-methyl-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CD and AU and using procedure E, the title compound was obtained as an off-white foam (21 mg; 18% yield).

MS (ESI, m/z): 509.3 [M+H⁺].

Example 185 (1R*,2S*)-9-fluoro-2-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CD and BK and using procedure E, the title compound was obtained as an off-white foam (64 mg; 55% yield).

MS (ESI, m/z): 510.3 [M+H⁺].

Example 186 (1R*,2R*)-9-fluoro-4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-2-carboxylic acid hydrochloride

A solution of the compound of Example 181 (20 mg) in dioxane (1 mL) was treated with aq. HCl (37%; 0.142 mL) and stirred at 50° C. for 3 h. The solution was concentrated under reduced pressure and the residue was suspended in EA/MeOH (4:1), filtered, washed with TBME and dried in HV, affording a gray solid (6 mg; 29% yield).

MS (ESI, m/z): 539.2 [M+H⁺].

Example 187 (RS)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2,5,6-tetrahydro-pyrrolo[3,2,1-ij]quinolin-4-one

A solution of the compound of Example 2 (60 mg) in MeOH/AcOH (1:1, 2 mL) was hydrogenated over Pd/C (133 mg) overnight. The catalyst was filtered off and thoroughly washed with MeOH and MeOH/DCM. The filtrate was concentrated under reduced pressure. The residue was taken up in water and 28% aq. NH₄OH, filtered, washed with water and TBME and dried under reduced pressure, affording an off-white foam (45 mg; 75% yield).

MS (ESI, m/z): 481.5 [M+H⁺].

Example 188 (1R*,2S*)-2-aminomethyl-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one 188.i. (1R*,2S*)-methanesulfonic acid 9-fluoro-4-oxo-1-{3-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-2-ylmethyl ester

Starting from the compounds of Preparations CE and U and using procedure E, the title compound was obtained as an off-white foam (79 mg; 30% yield).

MS (ESI, m/z): 603.3 [M+H⁺].

188.ii. (1R*,2S*)-2-azidomethyl-9-fluoro-1-{3-[2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

NaN₃ (25 mg) was added to a solution of intermediate 188.i (77 mg) in DMF (1.5 mL) and the resulting mixture was stirred at 80° C. for 1 h. Water and EA were added and the phases separated. The aq. layer was extracted once more with EA and the combined org. layers were washed with water and brine, dried over MgSO₄ and concentrated. The residue was purified by CC (DCM/MeOH/NH₄OH 1000:50:4), affording a light yellow foam (57 mg; 81% yield).

MS (ESI, m/z): 550.5 [M+H⁺].

188.iii. (1R*,2S*)-2-aminomethyl-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

A solution of intermediate 188.ii (57 mg) in THF (1.5 mL) was treated with PPh₃ (30 mg) and water (19 μL). The mixture was heated at 70° C. overnight, concentrated under reduced pressure and the residue was taken in DCM. The DCM layer was extracted with 1M HCl and the aq. layer was basified with NH₄OH. The aq. layer was extracted with DCM/MeOH (9:1) and the combined org. layers were dried over MgSO₄, concentrated and purified by CC (DCM/MeOH/NH₄OH 1000:100:8), affording a light yellow foam (26 mg; 48% yield).

MS (ESI, m/z): 524.3 [M+H⁺].

Example 189 (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CF and BJ and using procedure E, the title compound was obtained as an off-white foam (52 mg; 32% yield).

MS (ESI, m/z): 480.5 [M+H⁺].

Example 190 (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CF and AR and using procedure E, the title compound was obtained as an off-white foam (64 mg; 34% yield).

MS (ESI, m/z): 480.5 [M+H⁺].

Example 191 (S)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CF and BL and using procedure E, the title compound was obtained as an off-white foam (53 mg; 27% yield).

MS (ESI, m/z): 496.1 [M+H⁺].

Example 192 (S)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CF and BK and using procedure E, the title compound was obtained as an off-white solid (73 mg; 38% yield).

MS (ESI, m/z): 496.6 [M+H⁺].

Example 193 (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CG and BJ and using procedure E, the title compound was obtained as an off-white foam (56 mg; 34% yield).

MS (ESI, m/z): 480.6 [M+H⁺].

Example 194 (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CG and AR and using procedure E, the title compound was obtained as an off-white foam (71 mg; 38% yield).

MS (ESI, m/z): 480.6 [M+H⁺].

Example 195 (R)-9-fluoro-1-{3-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CG and BL and using procedure E, the title compound was obtained as a light yellow solid (52 mg; 27% yield).

MS (ESI, m/z): 496.5 [M+H⁺].

Example 196 (R)-9-fluoro-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations CG and BK and using procedure E, the title compound was obtained as a light yellow solid (55 mg; 28% yield).

MS (ESI, m/z): 496.6 [M+H⁺].

Example 197 (RS)-9-fluoro-1-({2-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and CH and using procedure C, the title compound was obtained as a pale yellow solid (40 mg; 22% yield).

MS (ESI, m/z): 496.6 [M+H⁺].

Example 198 (RS)-9-fluoro-1-({2-[(S)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-ethylamino}-methyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one

Starting from the compounds of Preparations A and BX and using procedure C, the title compound was obtained as a pale yellow solid (10 mg; 11% yield).

MS (ESI, m/z): 496.4 [M+H⁺].

Example 199 (RS)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-5,6-dihydro-pyrrolo[1,2,3-de]quinoxalin-3-one

Starting from the compounds of Preparations CI and BK and using procedure E, the title compound was obtained as a light yellow solid (650 mg; 26% yield).

MS (ESI, m/z): 497.5 [M+H⁺].

Example 200 (RS)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one

A solution of the compound of Preparation CI (0.2 g, 0.975 mmol) and the compound of Preparation BK (0.3 g, 0.975 mmol) in DCE/MeOH (1:1, 8 mL) was stirred at rt overnight. NaBH₄ (110 mg) was added and the mixture stirred at rt for 1 h. The mixture was quenched with HCl 1M and partitioned between DCM and diluted NH₄OH. The org. phase was dried over MgSO₄ and concentrated. The residue was purified by CC (DCM/MeOH 19:1 containing 1% NH₄OH). The title compound was obtained as a light rose foam (78 mg; 16% yield).

MS (ESI, m/z): 499.5 [M+H⁺].

Example 201 (RS)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-methyl-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one dihydrochloride 201.i. ((RS)-7-fluoro-3-oxo-5,6-dihydro-3H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-carbamic acid tert-butyl ester

A suspension of the compound of Example 199 (0.6 g, 1.2 mmol) in DCM (10 mL), MeOH (2 mL) and THF (5 mL) was treated with Boc₂O (526 mg, 2 eq.) was heated at reflux overnight. The volatiles were removed under reduced pressure and the residue purified by CC (EA) to give the desired intermediate as a beige foam (0.61 g, 85% yield).

MS (ESI, m/z): 597.7 [M+H⁺].

201.ii. ((RS)-7-fluoro-3-oxo-2,3,5,6-tetrahydro-1H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-carbamic acid tert-butyl ester

A solution of intermediate 201.i (610 mg) in MeOH/DCM (4:1; 20 mL) was treated with NaBH₄ (77 mg, 2 eq.) and stirred at rt for 2 h. The mixture was quenched with HCl 1M and partitioned between DCM and diluted NH₄OH. The org. phase was dried over MgSO₄ and concentrated. The residue was purified by CC (EA). The title compound was obtained as a beige foam (410 mg; 67% yield).

MS (ESI, m/z): 599.6 [M+H⁺].

201. iii. ((R)-7-fluoro-1-methyl-3-oxo-2,3,5,6-tetrahydro-1H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-carbamic acid tert-butyl ester

A solution of intermediate 201.ii (100 mg) in MeOH (3 mL) was treated with AcOH (0.019 mL), aq. formaldehyde (37%, 0.026 mL) and NaCNBH₃ (30 mg). The mixture was stirred at rt for 3 h. The mixture was diluted with EA and water and the org. phase was washed with NaHCO₃ and brine, dried over MgSO₄ and concentrated. The residue was crystallized from ether to give the desired intermediate as a colourless solid (0.075 g, 73% yield).

MS (ESI, m/z): 613.7 [M+H⁺].

201. iv. (RS)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-methyl-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one dihydrochloride

A suspension of intermediate 201.iii (0.068 g, 0.1 mmol) in HCl (4M in dioxane, 1 mL) was stirred at rt for 15 min. The volatiles were removed under reduced pressure and the solid was washed with ether and dried at HV. The title salt was isolated as a grey solid (0.068 g; quant.).

MS (ESI, m/z): 513.6 [M+H⁺].

Example 202 (RS)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-(3-hydroxypropyl)-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one dihydrochloride 202.i. ((R)-7-fluoro-1-(3-hydroxypropyl)-methyl-3-oxo-2,3,5,6-tetrahydro-1H-pyrrolo[1,2,3-de]quinoxalin-6-yl)-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propyl}-carbamic acid tert-butyl ester

A solution of intermediate 201.ii (100 mg) in MeOH (3 mL) was treated with AcOH (0.019 mL), aq. formaldehyde (37%, 0.026 mL) and 3-[(tert-butyldimethylsilyl)oxy]-1-propanal (88 mg, commercial). The mixture was stirred at rt for 5 h. The mixture was diluted with EA and water and the org. phase was washed with NaHCO₃ and brine, dried over MgSO₄ and concentrated. The residue was purified by CC (EA) to give the desired intermediate as a yellowish oil (0.11 g, 62% yield).

MS (ESI, m/z): 771.6 [M+H⁺].

202. ii. (RS)-7-fluoro-6-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1-(3-hydroxypropyl)-1,2,5,6-tetrahydro-pyrrolo[1,2,3-de]quinoxalin-3-one dihydrochloride

A suspension of intermediate 202.i (0.11 g, 0.14 mmol) in HCl (4M in dioxane, 1.5 mL) was stirred at rt for 15 min. The volatiles were removed under reduced pressure and the solid was washed with ether and dried at HV. The title salt was isolated as a grey solid (0.071 g; 78% yield).

MS (ESI, m/z): 557.3 [M+H⁺].

Pharmacological Properties of the Invention Compounds In Vitro Assays Experimental Methods:

Minimal inhibitory concentrations (MICs; mg/l) were determined in cation-adjusted Mueller-Hinton Broth by a microdilution method following the description given in “Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria that Grow Aerobically”, Approved standard, 7^(th) ed., Clinical and Laboratory Standards Institute (CLSI) Document M7-A7, Wayne, Pa., USA, 2006.

Results:

All Example compounds were tested against several Gram positive and Gram negative bacteria such as S. aureus, E. faecalis, S. pneumoniae, M. catarrhalis, A. baumanii, E. coli or P. aeruginosa.

Typical antibacterial test results are given in the table hereafter (MIC in mg/l).

Example MIC for MIC for No. M. catarrhalis A894 Example No. M. catarrhalis A894 1 ≦0.031 2 ≦0.031 3 ≦0.031 4 ≦0.031 5 ≦0.031 6 0.125 7 ≦0.031 8 ≦0.031 9 ≦0.031 10 ≦0.031 11 0.063 12 ≦0.031 13 ≦0.031 14 ≦0.031 15 ≦0.031 16 ≦0.031 17 ≦0.031 18 ≦0.031 19 ≦0.031 20 ≦0.031 21 ≦0.031 22 ≦0.031 23 ≦0.031 24 ≦0.031 25 ≦0.031 26 0.25 27 0.5 28 ≦0.031 29 ≦0.031 30 0.031 31 16 32 0.031 33 16 34 ≦0.031 35 ≦0.031 36 8 37 1 38 16 39 ≦0.031 40 0.125 41 0.5 42 2 43 1 44 0.125 45 0.063 46 ≦0.031 47 ≦0.031 48 ≦0.031 49 ≦0.031 50 ≦0.031 51 ≦0.031 52 ≦0.031 53 ≦0.031 54 0.25 55 ≦0.031 56 ≦0.031 57 ≦0.031 58 ≦0.031 59 4 60 ≦0.031 61 ≦0.031 62 ≦0.031 63 0.031 64 ≦0.031 65 ≦0.031 66 ≦0.031 67 ≦0.063 68 ≦0.031 69 ≦0.031 70 ≦0.031 71 ≦0.031 72 ≦0.031 73 ≦0.031 74 ≦0.031 75 ≦0.031 76 ≦0.031 77 0.031 78 ≦0.031 79 ≦0.031 80 ≦0.031 81 ≦0.031 82 0.25 83 ≦0.031 84 0.063 85 ≦0.031 86 ≦0.031 87 ≦0.031 88 ≦0.031 89 0.063 90 ≦0.031 91 ≦0.031 92 ≦0.031 93 ≦0.031 94 ≦0.031 95 ≦0.031 96 ≦0.031 97 ≦0.031 98 0.25 99 ≦0.031 100 0.031 101 ≦0.031 102 ≦0.031 103 ≦0.031 104 ≦0.031 105 ≦0.031 106 ≦0.031 107 8 108 ≦0.031 109 ≦0.031 110 ≦0.031 111 0.125 112 ≦0.031 113 ≦0.031 114 ≦0.031 115 ≦0.031 116 ≦0.031 117 13.031 118 13.031 119 ≦0.031 120 0.125 121 0.125 122 0.5 123 0.125 124 ≦0.031 125 ≦0.031 126 ≦0.031 127 ≦0.031 128 ≦0.031 129 ≦0.031 130 ≦0.031 131 ≦0.031 132 ≦0.031 133 ≦0.031 134 ≦0.031 135 ≦0.031 136 ≦0.031 137 ≦0.031 138 ≦0.031 139 ≦0.031 140 ≦0.031 141 ≦0.031 142 ≦0.031 143 ≦0.031 144 ≦0.031 145 ≦0.031 146 ≦0.031 147 ≦0.031 148 ≦0.031 149 ≦0.031 150 ≦0.031 151 ≦0.031 152 ≦0.031 153 ≦0.031 154 ≦0.031 155 ≦0.031 156 ≦0.031 157 2 158 ≦0.031 159 ≦0.031 160 ≦0.031 161 0.125 162 0.25 163 0.031 164 0.031 165 0.125 166 ≦0.031 167 ≦0.031 168 ≦0.031 169 ≦0.031 170 0.25 171 ≦0.031 172 0.25 173 0.125 174 ≦0.031 175 ≦0.031 176 ≦0.031 177 ≦0.031 178 ≦0.031 179 ≦0.031 180 ≦0.031 181 ≦0.031 182 ≦0.031 183 ≦0.031 184 ≦0.031 185 ≦0.031 186 0.5 187 ≦0.031 188 ≦0.031 189 ≦0.031 190 ≦0.031 191 ≦0.031 192 ≦0.031 193 ≦0.031 194 ≦0.031 195 ≦0.031 196 ≦0.031 197 ≦0.031 198 ≦0.031 199 ≦0.031 200 ≦0.031 201 ≦0.031 202 0.063 

1. A compound of formula I

wherein “-----” is a bond or is absent; R⁰ represents H or, in the case “-----” is a bond, may also represent (C₁-C₃)alkoxy; R¹ represents cyano, (C₁-C₃)alkyl, or ethynyl; U represents CH or N when “-----” is a bond, or, in case “----” is absent, U represents CH₂, NH or NR⁹; V represents CH, CR⁶, or N; R² represents H, (C₁-C₃)alkylcarbonyl or a group of the formula —CH₂—R³; R³ represents H, (C₁-C₃)alkyl or (C₁-C₃)hydroxyalkyl; R⁴ represents H or, in the cases wherein n is not 0 and R⁵ is H, may also represent OH; R⁵ represents H, (C₁-C₃)alkyl, (C₁-C₃)hydroxyalkyl, (C₁-C₃)aminoalkyl, (C₁-C₃)alkoxy(C₁-C₃)alkyl, carboxy or (C₁-C₃)alkoxycarbonyl; R⁶ represents (C₁-C₃)hydroxyalkyl, carboxy, (C₁-C₃)alkoxycarbonyl, or a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2, or 3 and each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ form together with a nitrogen atom bearing them a pyrrolidinyl, piperidinyl, morpholinyl or thiomorpholinyl ring; R⁹ represents (C₁-C₃)alkyl, 2-hydroxy-ethyl, 2-hydroxy-propyl or 3-hydroxy-propyl; A represents —(CH₂)_(p)—, —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—; G represents a phenyl group which is substituted once or twice in the meta and/or para position(s) by substituents selected independently from (C₁-C₄)alkyl, (C₁-C₃)alkoxy, or a halogen, or G is one of the formulae G¹ and G² below

wherein Q is O or S and X is CH or N; and Y¹, Y² and Y³ each represent CH, or Y¹ and Y³ each represent CH and Y² represents N, or Y¹ represents N, Y² represents CH or N and Y³ represents CH, or Y¹ and Y² each represent CH and Y³ represents N; and n is 0 when A represents —CH₂CH₂CH(OH)— or —COCH₂CH(OH)—, and n is 0, 1, or 2 when A represents (CH₂)_(p), p being 1, 2, 3 or 4, with the proviso that the sum of n and p is then 2, 3, or 4; or a salt of such a compound.
 2. The compound according to claim 1, wherein R¹ represents cyano or (C₁-C₃)alkyl; U represents CH or N when “-----” is a bond, or, in case “----” is absent, U represents CH₂ or NH; R⁵ represents H, (C₁-C₃)alkyl, (C₁-C₃)hydroxyalkyl, (C₁-C₃)alkoxy(C₁-C₃)alkyl or (C₁-C₃)alkoxycarbonyl; or a salt thereof of such a compound. 3-4. (canceled)
 5. The compound according to claim 1, wherein “-----” is a bond, V represents CH and U represents CH or N, or V represents CR⁶ and U represents CH, or V represents N and U represents CH; or “-----” is absent, V represents CH and U represents CH₂, NH or NR⁹; R² represents H, acetyl or a group of the formula —CH₂—R³; R⁶ represents (C₁-C₃)hydroxyalkyl, carboxy, (C₁-C₃)alkoxycarbonyl or a group —(CH₂)_(q)—NR⁷R⁸ wherein q is 1, 2 or 3 and each of R⁷ and R⁸ independently represents H or (C₁-C₃)alkyl or R⁷ and R⁸ form together with the nitrogen atom bearing them a pyrrolidinyl or piperidinyl ring; and each of Y¹ and Y³ represents CH, or one of Y¹ and Y³ represents N and the other represents CH; or a salt thereof.
 6. The compound according to claim 1, wherein R¹ represents (C₁-C₃)alkyl; or a salt thereof.
 7. The compound according to claim 1, wherein V represents CH; or a salt thereof.
 8. The compound according to claim 1, wherein V represents N; or a salt thereof.
 9. The compound according to claim 1, wherein “-----” is a bond and U represents CH or N; or a salt thereof.
 10. The compound according to claim 1, wherein “-----” is absent and U represents CH₂, NH or NR⁹; or a salt thereof.
 11. The compound according to claim 1, wherein G is a group of the formula

wherein Q represents O or S; or a salt thereof. 12-13. (canceled)
 14. The compound according to claim 1, wherein said compound is: 4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; 4-oxo-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-9-carbonitrile; 9-methyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; 9-ethyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; or 9-ethynyl-1-{3-[(R)-2-oxo-3-(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazin-6-yl)-oxazolidin-5-yl]-propylamino}-1,2-dihydro-pyrrolo[3,2,1-ij]quinolin-4-one; or a salt thereof.
 15. (canceled)
 16. A pharmaceutical composition comprising a therapeutically effective amount of a compound according to claim 1, or a pharmaceutically acceptable salt thereof, and at least one therapeutically inert excipient.
 17. A method of preventing or treating a bacterial infection in a subject comprising administering to said subject a pharmaceutically active amount of the compound according to claim 1, or a pharmaceutically acceptable salt thereof.
 18. (canceled)
 19. The compound of formula I according to claim 1, wherein R¹ represents ethynyl; or a salt thereof. 